Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs
===================================================================
diff -u -r026cc14e6eb321e7e3e1c16d2e278cab74602339 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 026cc14e6eb321e7e3e1c16d2e278cab74602339)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -41,6 +41,7 @@
 using Ringtoets.Common.Data.Probability;
 using Ringtoets.Common.Data.Structures;
 using Ringtoets.Common.Forms;
+using Ringtoets.Common.Forms.ChangeHandlers;
 using Ringtoets.Common.Forms.Helpers;
 using Ringtoets.Common.Forms.PresentationObjects;
 using Ringtoets.Common.Forms.TreeNodeInfos;
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/ChangeHandlers/FailureMechanismPropertyChangeHandler.cs
===================================================================
diff -u
--- Ringtoets/Common/src/Ringtoets.Common.Forms/ChangeHandlers/FailureMechanismPropertyChangeHandler.cs	(revision 0)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/ChangeHandlers/FailureMechanismPropertyChangeHandler.cs	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -0,0 +1,141 @@
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows.Forms;
+using Core.Common.Base;
+using Ringtoets.Common.Data.FailureMechanism;
+using Ringtoets.Common.Forms.Properties;
+using Ringtoets.Common.Forms.PropertyClasses;
+using CoreCommonBaseResources = Core.Common.Base.Properties.Resources;
+
+namespace Ringtoets.Common.Forms.ChangeHandlers
+{
+    /// <summary>
+    /// Class which properly handles data model changes due to a change of a
+    /// failure mechanism property.
+    /// </summary>
+    public class FailureMechanismPropertyChangeHandler<T> : IFailureMechanismPropertyChangeHandler<T> where T : IFailureMechanism
+    {
+        public IEnumerable<IObservable> SetPropertyValueAfterConfirmation<TValue>(
+            T failureMechanism,
+            TValue value, SetFailureMechanismPropertyValueDelegate<T, TValue> setValue)
+        {
+            if (failureMechanism == null)
+            {
+                throw new ArgumentNullException(nameof(failureMechanism));
+            }
+            if (value == null)
+            {
+                throw new ArgumentNullException(nameof(value));
+            }
+            if (setValue == null)
+            {
+                throw new ArgumentNullException(nameof(setValue));
+            }
+
+            var changedObjects = new List<IObservable>();
+
+            if (RequiresConfirmation(failureMechanism))
+            {
+                if (ConfirmPropertyChange())
+                {
+                    setValue(failureMechanism, value);
+                    changedObjects.AddRange(PropertyChanged(failureMechanism));
+                    changedObjects.Add(failureMechanism);
+                }
+            }
+            else
+            {
+                setValue(failureMechanism, value);
+                changedObjects.Add(failureMechanism);
+            }
+
+            return changedObjects;
+        }
+
+        /// <summary>
+        /// Gets the message that is shown when conformation is inquired.
+        /// </summary>
+        protected virtual string ConfirmationMessage
+        {
+            get
+            {
+                return Resources.FailureMechanismPropertyChangeHandler_Confirm_change_composition_and_clear_dependent_data;
+            }
+        }
+
+        /// <summary>
+        /// Checks whether a call to <see cref="PropertyChanged"/> would have any effect in the given
+        /// <paramref name="failureMechanism"/>.
+        /// </summary>
+        /// <param name="failureMechanism">The failure mechanism to check for.</param>
+        /// <returns><c>true</c> if <see cref="PropertyChanged"/> would result in changes, 
+        /// <c>false</c> otherwise.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/>
+        /// is <c>null</c>.</exception>
+        protected virtual bool RequiresConfirmation(T failureMechanism)
+        {
+            if (failureMechanism == null)
+            {
+                throw new ArgumentNullException(nameof(failureMechanism));
+            }
+            return failureMechanism.Calculations.Any(c => c.HasOutput);
+        }
+
+        /// <summary>
+        /// Propagates the necessary changes to underlying data structure when a property has 
+        /// been changed for a failure mechanism.
+        /// </summary>
+        /// <param name="failureMechanism">The failure mechanism to be updated.</param>
+        /// <returns>All objects that have been affected by the change.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/>
+        /// is <c>null</c>.</exception>
+        protected virtual IEnumerable<IObservable> PropertyChanged(T failureMechanism)
+        {
+            if (failureMechanism == null)
+            {
+                throw new ArgumentNullException(nameof(failureMechanism));
+            }
+            var affected = new List<IObservable>();
+            foreach (var calculation in failureMechanism.Calculations.Where(c => c.HasOutput))
+            {
+                affected.Add(calculation);
+                calculation.ClearOutput();
+            }
+            return affected;
+        }
+
+        /// <summary>
+        /// Checks to see if the change of the failure mechanism property should occur or not.
+        /// </summary>
+        /// <returns><c>true</c> if the change should occur, <c>false</c> otherwise.</returns>
+        private bool ConfirmPropertyChange()
+        {
+            DialogResult result = MessageBox.Show(ConfirmationMessage,
+                                                  CoreCommonBaseResources.Confirm,
+                                                  MessageBoxButtons.OKCancel);
+            return result == DialogResult.OK;
+        }
+    }
+}
\ No newline at end of file
Fisheye: Tag 58e63d129c58c0247ce8918486f4e68120876bd9 refers to a dead (removed) revision in file `Ringtoets/Common/src/Ringtoets.Common.Forms/FailureMechanismPropertyChangeHandler.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/IFailureMechanismPropertyChangeHandler.cs
===================================================================
diff -u -r1188217e2d4f0c433987018e1cd6eb85af9488c1 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/IFailureMechanismPropertyChangeHandler.cs	(.../IFailureMechanismPropertyChangeHandler.cs)	(revision 1188217e2d4f0c433987018e1cd6eb85af9488c1)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/IFailureMechanismPropertyChangeHandler.cs	(.../IFailureMechanismPropertyChangeHandler.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -1,4 +1,25 @@
-using System;
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
 using System.Collections.Generic;
 using Core.Common.Base;
 using Ringtoets.Common.Data.FailureMechanism;
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/IPropertyChangeHandler.cs
===================================================================
diff -u -rc0849c80b8bab9023c7df1e8402aa380891496d2 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/IPropertyChangeHandler.cs	(.../IPropertyChangeHandler.cs)	(revision c0849c80b8bab9023c7df1e8402aa380891496d2)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/IPropertyChangeHandler.cs	(.../IPropertyChangeHandler.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -1,5 +1,26 @@
-using Core.Common.Gui.PropertyBag;
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
 
+using Core.Common.Gui.PropertyBag;
+
 namespace Ringtoets.Common.Forms.PropertyClasses
 {
     /// <summary>
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Ringtoets.Common.Forms.csproj
===================================================================
diff -u -r888f6cdc81e8fb6d6a5b9baadf6395f209008836 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Ringtoets.Common.Forms.csproj	(.../Ringtoets.Common.Forms.csproj)	(revision 888f6cdc81e8fb6d6a5b9baadf6395f209008836)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Ringtoets.Common.Forms.csproj	(.../Ringtoets.Common.Forms.csproj)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -47,7 +47,7 @@
     <Compile Include="..\..\..\..\Core\Common\src\Core.Common.Version\GlobalAssembly.cs">
       <Link>Properties\GlobalAssembly.cs</Link>
     </Compile>
-    <Compile Include="FailureMechanismPropertyChangeHandler.cs" />
+    <Compile Include="ChangeHandlers\FailureMechanismPropertyChangeHandler.cs" />
     <Compile Include="GuiServices\HydraulicBoundaryLocationCalculationGuiService.cs" />
     <Compile Include="GuiServices\IHydraulicBoundaryLocationCalculationGuiService.cs" />
     <Compile Include="Helpers\SelectableHydraulicBoundaryLocationHelper.cs" />
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Views/CalculatableView.Designer.cs
===================================================================
diff -u -re468a5451f59115ec6ca32c014da1baaa38866e8 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Views/CalculatableView.Designer.cs	(.../CalculatableView.Designer.cs)	(revision e468a5451f59115ec6ca32c014da1baaa38866e8)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Views/CalculatableView.Designer.cs	(.../CalculatableView.Designer.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -1,4 +1,25 @@
-namespace Ringtoets.Common.Forms.Views
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+namespace Ringtoets.Common.Forms.Views
 {
     partial class CalculatableView<T>
     {
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/ChangeHandlers/FailureMechanismPropertyChangeHandlerTest.cs
===================================================================
diff -u
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/ChangeHandlers/FailureMechanismPropertyChangeHandlerTest.cs	(revision 0)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/ChangeHandlers/FailureMechanismPropertyChangeHandlerTest.cs	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -0,0 +1,300 @@
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using Core.Common.Base;
+using NUnit.Extensions.Forms;
+using NUnit.Framework;
+using Ringtoets.Common.Data.FailureMechanism;
+using Ringtoets.Common.Data.TestUtil;
+using Ringtoets.Common.Forms.ChangeHandlers;
+using Ringtoets.Common.Forms.TestUtil;
+
+namespace Ringtoets.Common.Forms.Test.ChangeHandlers
+{
+    [TestFixture]
+    public class FailureMechanismPropertyChangeHandlerTest : NUnitFormTest
+    {
+        [Test]
+        public void SetPropertyValueAfterConfirmation_WithoutFailureMechanism_ThrowsArgumentNullException()
+        {
+            // Setup
+            var changeHandler = new FailureMechanismPropertyChangeHandler<IFailureMechanism>();
+
+            // Call
+            TestDelegate test = () => changeHandler.SetPropertyValueAfterConfirmation<int>(
+                null,
+                3,
+                (f, v) => { });
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("failureMechanism", paramName);
+        }
+
+        [Test]
+        public void SetPropertyValueAfterConfirmation_WithoutValue_ThrowsArgumentNullException()
+        {
+            // Setup
+            var changeHandler = new FailureMechanismPropertyChangeHandler<IFailureMechanism>();
+
+            // Call
+            TestDelegate test = () => changeHandler.SetPropertyValueAfterConfirmation<int?>(
+                new TestFailureMechanism(),
+                null,
+                (f, v) => { });
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("value", paramName);
+        }
+
+        [Test]
+        public void SetPropertyValueAfterConfirmation_WithoutSetProperty_ThrowsArgumentNullException()
+        {
+            // Setup
+            var changeHandler = new FailureMechanismPropertyChangeHandler<IFailureMechanism>();
+
+            // Call
+            TestDelegate test = () => changeHandler.SetPropertyValueAfterConfirmation(
+                new TestFailureMechanism(),
+                3,
+                null);
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("setValue", paramName);
+        }
+
+        [Test]
+        [TestCaseSource(nameof(ChangePropertyTestCases))]
+        public void SetPropertyValueAfterConfirmation_IfConfirmationRequiredThenGiven_SetValueCalledAffectedObjectsReturned(ChangePropertyTestCase testCase)
+        {
+            // Setup
+            var dialogBoxWillBeShown = testCase.ExpectedAffectedCalculations.Any();
+
+            string title = "";
+            string message = "";
+            if (dialogBoxWillBeShown)
+            {
+                DialogBoxHandler = (name, wnd) =>
+                {
+                    var tester = new MessageBoxTester(wnd);
+                    title = tester.Title;
+                    message = tester.Text;
+
+                    tester.ClickOk();
+                };
+            }
+
+            var testFailureMechanism = new TestFailureMechanism(testCase.Calculations);
+            var propertySet = 0;
+
+            var changeHandler = new FailureMechanismPropertyChangeHandler<IFailureMechanism>();
+            
+            // Call
+            var affectedObjects = changeHandler.SetPropertyValueAfterConfirmation(
+                testFailureMechanism,
+                3,
+                (f, v) => propertySet++);
+
+            // Assert
+            if (dialogBoxWillBeShown)
+            {
+                Assert.AreEqual("Bevestigen", title);
+                string expectedMessage = "Als u een parameter in een toetsspoor wijzigt, zal de uitvoer van alle berekeningen in dit toetsspoor verwijderd worden." + Environment.NewLine +
+                                         Environment.NewLine +
+                                         "Weet u zeker dat u wilt doorgaan?";
+                Assert.AreEqual(expectedMessage, message);
+            }
+            Assert.AreEqual(1, propertySet);
+            var expectedAffectedObjects = new List<IObservable>(testCase.ExpectedAffectedCalculations);
+            expectedAffectedObjects.Add(testFailureMechanism);
+            CollectionAssert.AreEqual(expectedAffectedObjects, affectedObjects);
+        }
+
+        [Test]
+        public void SetPropertyValueAfterConfirmation_ConfirmationRequiredButNotGiven_SetValueNotCalledNoAffectedObjectsReturned()
+        {
+            // Setup
+            DialogBoxHandler = (name, wnd) =>
+            {
+                var tester = new MessageBoxTester(wnd);
+                tester.ClickCancel();
+            };
+
+            var calculationWithOutput = CreateCalculationWithOutput();
+            var calculationWithoutOutput = CreateCalculationWithoutOutput();
+
+            var testFailureMechanism = new TestFailureMechanism(
+                new[]
+                {
+                    calculationWithOutput,
+                    calculationWithoutOutput
+                });
+            var propertySet = 0;
+
+            var changeHandler = new FailureMechanismPropertyChangeHandler<IFailureMechanism>();
+            
+            // Call
+            var affectedObjects = changeHandler.SetPropertyValueAfterConfirmation(
+                testFailureMechanism,
+                3,
+                (f, v) => propertySet++);
+
+            // Assert
+            Assert.AreEqual(0, propertySet);
+            CollectionAssert.IsEmpty(affectedObjects);
+        }
+
+        [Test]
+        public void SetPropertyValueAfterConfirmation_ConfirmationRequiredAndGivenExceptionInSetValue_ExceptionBubbled()
+        {
+            // Setup
+            DialogBoxHandler = (name, wnd) =>
+            {
+                var tester = new MessageBoxTester(wnd);
+                tester.ClickOk();
+            };
+
+            var testFailureMechanism = new TestFailureMechanism(
+                new[]
+                {
+                    CreateCalculationWithOutput(),
+                });
+
+            var changeHandler = new FailureMechanismPropertyChangeHandler<IFailureMechanism>();
+            var expectedException = new Exception();
+
+            // Call
+            TestDelegate test = () => changeHandler.SetPropertyValueAfterConfirmation(
+                testFailureMechanism,
+                3,
+                (f, v) => { throw expectedException; });
+
+            // Assert
+            var exception = Assert.Throws<Exception>(test);
+            Assert.AreSame(expectedException, exception);
+        }
+
+        [Test]
+        public void SetPropertyValueAfterConfirmation_ConfirmationNotRequiredExceptionInSetValue_ExceptionBubbled()
+        {
+            // Setup
+            var testFailureMechanism = new TestFailureMechanism();
+            var changeHandler = new FailureMechanismPropertyChangeHandler<IFailureMechanism>();
+            var expectedException = new Exception();
+
+            // Call
+            TestDelegate test = () => changeHandler.SetPropertyValueAfterConfirmation(
+                testFailureMechanism,
+                3,
+                (f, v) => { throw expectedException; });
+
+            // Assert
+            var exception = Assert.Throws<Exception>(test);
+            Assert.AreSame(expectedException, exception);
+        }
+
+        public class ChangePropertyTestCase
+        {
+            public ChangePropertyTestCase(ICollection<TestCalculation> calculations)
+            {
+                Calculations = calculations;
+                ExpectedAffectedCalculations = calculations.Where(c => c.HasOutput).ToArray();
+            }
+
+            public ICollection<TestCalculation> Calculations { get; private set; }
+            public ICollection<TestCalculation> ExpectedAffectedCalculations { get; private set; }
+        }
+
+        static IEnumerable ChangePropertyTestCases()
+        {
+            yield return new TestCaseData(
+                new ChangePropertyTestCase(new TestCalculation[0])
+
+            ).SetName("SetPropertyValueAfterConfirmation No calculations");
+
+            yield return new TestCaseData(
+                new ChangePropertyTestCase(new[]
+                             {
+                                 CreateCalculationWithOutput()
+                             })
+            ).SetName("SetPropertyValueAfterConfirmation Single calculation with output");
+
+            yield return new TestCaseData(
+                new ChangePropertyTestCase(new[]
+                             {
+                                 CreateCalculationWithoutOutput()
+                             })
+            ).SetName("SetPropertyValueAfterConfirmation Single calculation without output");
+
+            yield return new TestCaseData(
+                new ChangePropertyTestCase(new[]
+                             {
+                                 CreateCalculationWithoutOutput(),
+                                 CreateCalculationWithoutOutput()
+                             })
+            ).SetName("SetPropertyValueAfterConfirmation Two calculations without output");
+
+            yield return new TestCaseData(
+                new ChangePropertyTestCase(new[]
+                             {
+                                 CreateCalculationWithOutput(),
+                                 CreateCalculationWithoutOutput()
+                             })
+            ).SetName("SetPropertyValueAfterConfirmation Calculation without and calculation with output");
+
+            yield return new TestCaseData(
+                new ChangePropertyTestCase(new[]
+                             {
+                                 CreateCalculationWithOutput(),
+                                 CreateCalculationWithOutput()
+                             })
+            ).SetName("SetPropertyValueAfterConfirmation Two calculations with output");
+
+            yield return new TestCaseData(
+                new ChangePropertyTestCase(new[]
+                             {
+                                 CreateCalculationWithOutput(),
+                                 CreateCalculationWithOutput(),
+                                 CreateCalculationWithoutOutput()
+                             })
+            ).SetName("SetPropertyValueAfterConfirmation Two calculations with and one calculation without output");
+        }
+
+        private static TestCalculation CreateCalculationWithoutOutput()
+        {
+            return new TestCalculation();
+        }
+
+        private static TestCalculation CreateCalculationWithOutput()
+        {
+            return new TestCalculation
+            {
+                Output = new object()
+            };
+        }
+    }
+}
\ No newline at end of file
Fisheye: Tag 58e63d129c58c0247ce8918486f4e68120876bd9 refers to a dead (removed) revision in file `Ringtoets/Common/test/Ringtoets.Common.Forms.Test/FailureMechanismPropertyChangeHandlerTest.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Ringtoets.Common.Forms.Test.csproj
===================================================================
diff -u -r737cd3675ab5bc1b6400e4a0b86ebd543eaee650 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Ringtoets.Common.Forms.Test.csproj	(.../Ringtoets.Common.Forms.Test.csproj)	(revision 737cd3675ab5bc1b6400e4a0b86ebd543eaee650)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Ringtoets.Common.Forms.Test.csproj	(.../Ringtoets.Common.Forms.Test.csproj)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -63,7 +63,7 @@
     <Compile Include="..\..\..\..\Core\Common\src\Core.Common.Version\GlobalAssembly.cs">
       <Link>Properties\GlobalAssembly.cs</Link>
     </Compile>
-    <Compile Include="FailureMechanismPropertyChangeHandlerTest.cs" />
+    <Compile Include="ChangeHandlers\FailureMechanismPropertyChangeHandlerTest.cs" />
     <Compile Include="GuiServices\HydraulicBoundaryLocationCalculationGuiServiceTest.cs" />
     <Compile Include="Helpers\NamingHelperTest.cs" />
     <Compile Include="Helpers\ProbabilityFormattingHelperTest.cs" />
Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/DuneErosionFailureMechanismPropertyChangeHandler.cs
===================================================================
diff -u -r33996c939c8044f0e09d8b1f1ef69b5b5b1e28c3 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/DuneErosionFailureMechanismPropertyChangeHandler.cs	(.../DuneErosionFailureMechanismPropertyChangeHandler.cs)	(revision 33996c939c8044f0e09d8b1f1ef69b5b5b1e28c3)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/DuneErosionFailureMechanismPropertyChangeHandler.cs	(.../DuneErosionFailureMechanismPropertyChangeHandler.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -23,6 +23,7 @@
 using System.Linq;
 using Core.Common.Base;
 using Ringtoets.Common.Forms;
+using Ringtoets.Common.Forms.ChangeHandlers;
 using Ringtoets.DuneErosion.Data;
 using Ringtoets.DuneErosion.Forms.Properties;
 using Ringtoets.DuneErosion.Service;
Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsPlugin.cs
===================================================================
diff -u -r30ac0dd5ba8b2d4394fdcc734880bfb5006ad9f5 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsPlugin.cs	(.../GrassCoverErosionInwardsPlugin.cs)	(revision 30ac0dd5ba8b2d4394fdcc734880bfb5006ad9f5)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsPlugin.cs	(.../GrassCoverErosionInwardsPlugin.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -34,6 +34,7 @@
 using Ringtoets.Common.Data.FailureMechanism;
 using Ringtoets.Common.Data.Probability;
 using Ringtoets.Common.Forms;
+using Ringtoets.Common.Forms.ChangeHandlers;
 using Ringtoets.Common.Forms.Helpers;
 using Ringtoets.Common.Forms.PresentationObjects;
 using Ringtoets.Common.Forms.TreeNodeInfos;
Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Forms/GrassCoverErosionOutwardsFailureMechanismPropertyChangeHandler.cs
===================================================================
diff -u -re853e0f8c9bfa09ee56ce3e323d82b1d42446e02 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Forms/GrassCoverErosionOutwardsFailureMechanismPropertyChangeHandler.cs	(.../GrassCoverErosionOutwardsFailureMechanismPropertyChangeHandler.cs)	(revision e853e0f8c9bfa09ee56ce3e323d82b1d42446e02)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Forms/GrassCoverErosionOutwardsFailureMechanismPropertyChangeHandler.cs	(.../GrassCoverErosionOutwardsFailureMechanismPropertyChangeHandler.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -3,6 +3,7 @@
 using System.Linq;
 using Core.Common.Base;
 using Ringtoets.Common.Forms;
+using Ringtoets.Common.Forms.ChangeHandlers;
 using Ringtoets.Common.Service;
 using Ringtoets.GrassCoverErosionOutwards.Data;
 using Ringtoets.GrassCoverErosionOutwards.Forms.Properties;
Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Plugin/HeightStructuresPlugin.cs
===================================================================
diff -u -r026cc14e6eb321e7e3e1c16d2e278cab74602339 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Plugin/HeightStructuresPlugin.cs	(.../HeightStructuresPlugin.cs)	(revision 026cc14e6eb321e7e3e1c16d2e278cab74602339)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Plugin/HeightStructuresPlugin.cs	(.../HeightStructuresPlugin.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -35,6 +35,7 @@
 using Ringtoets.Common.Data.Probability;
 using Ringtoets.Common.Data.Structures;
 using Ringtoets.Common.Forms;
+using Ringtoets.Common.Forms.ChangeHandlers;
 using Ringtoets.Common.Forms.Helpers;
 using Ringtoets.Common.Forms.PresentationObjects;
 using Ringtoets.Common.Forms.TreeNodeInfos;
Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/FailureMechanismContributionProperties.cs
===================================================================
diff -u -rb2b9fdf365e70928a05c57966eeed30d9050e528 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/FailureMechanismContributionProperties.cs	(.../FailureMechanismContributionProperties.cs)	(revision b2b9fdf365e70928a05c57966eeed30d9050e528)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/FailureMechanismContributionProperties.cs	(.../FailureMechanismContributionProperties.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -23,7 +23,6 @@
 using System.Collections.Generic;
 using System.ComponentModel;
 using Core.Common.Base;
-using Core.Common.Gui.Attributes;
 using Core.Common.Gui.PropertyBag;
 using Core.Common.Utils;
 using Core.Common.Utils.Attributes;
@@ -39,9 +38,9 @@
     /// </summary>
     public class FailureMechanismContributionProperties : ObjectProperties<FailureMechanismContribution>
     {
-        private IFailureMechanismContributionNormChangeHandler normChangeHandler;
-        private IAssessmentSectionCompositionChangeHandler compositionChangeHandler;
-        private IAssessmentSection assessmentSection;
+        private readonly IFailureMechanismContributionNormChangeHandler normChangeHandler;
+        private readonly IAssessmentSectionCompositionChangeHandler compositionChangeHandler;
+        private readonly IAssessmentSection assessmentSection;
 
         /// <summary>
         /// Creates a new instance of <see cref="FailureMechanismContributionProperties"/>.
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs
===================================================================
diff -u -r026cc14e6eb321e7e3e1c16d2e278cab74602339 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision 026cc14e6eb321e7e3e1c16d2e278cab74602339)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -34,6 +34,7 @@
 using Ringtoets.Common.Data.Calculation;
 using Ringtoets.Common.Data.FailureMechanism;
 using Ringtoets.Common.Forms;
+using Ringtoets.Common.Forms.ChangeHandlers;
 using Ringtoets.Common.Forms.Helpers;
 using Ringtoets.Common.Forms.PresentationObjects;
 using Ringtoets.Common.Forms.TreeNodeInfos;
Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Plugin/StabilityPointStructuresPlugin.cs
===================================================================
diff -u -r026cc14e6eb321e7e3e1c16d2e278cab74602339 -r58e63d129c58c0247ce8918486f4e68120876bd9
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Plugin/StabilityPointStructuresPlugin.cs	(.../StabilityPointStructuresPlugin.cs)	(revision 026cc14e6eb321e7e3e1c16d2e278cab74602339)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Plugin/StabilityPointStructuresPlugin.cs	(.../StabilityPointStructuresPlugin.cs)	(revision 58e63d129c58c0247ce8918486f4e68120876bd9)
@@ -34,6 +34,7 @@
 using Ringtoets.Common.Data.Probability;
 using Ringtoets.Common.Data.Structures;
 using Ringtoets.Common.Forms;
+using Ringtoets.Common.Forms.ChangeHandlers;
 using Ringtoets.Common.Forms.Helpers;
 using Ringtoets.Common.Forms.PresentationObjects;
 using Ringtoets.Common.Forms.TreeNodeInfos;