Index: Core/Gui/src/Core.Gui/UITypeEditors/SelectableMetaDataAttribute.cs
===================================================================
diff -u -r9e9976818f1b446948c3bf815cafe2e023f98ac1 -raac477d8a132304a11819bff90068340d0a74d64
--- Core/Gui/src/Core.Gui/UITypeEditors/SelectableMetaDataAttribute.cs	(.../SelectableMetaDataAttribute.cs)	(revision 9e9976818f1b446948c3bf815cafe2e023f98ac1)
+++ Core/Gui/src/Core.Gui/UITypeEditors/SelectableMetaDataAttribute.cs	(.../SelectableMetaDataAttribute.cs)	(revision aac477d8a132304a11819bff90068340d0a74d64)
@@ -28,7 +28,7 @@
     /// Class that represents a <see cref="FeatureBasedMapData.MetaData"/> attribute in the drop down list edit control
     /// for the <see cref="FeatureBasedMapData.MetaData"/>.
     /// </summary>
-    public class SelectableMetaDataAttribute
+    public sealed class SelectableMetaDataAttribute
     {
         /// <summary>
         /// Creates a new instance of <see cref="SelectableMetaDataAttribute"/>.
Index: Core/Gui/test/Core.Gui.Test/UITypeEditors/SelectableMetaDataAttributeTest.cs
===================================================================
diff -u -r9e9976818f1b446948c3bf815cafe2e023f98ac1 -raac477d8a132304a11819bff90068340d0a74d64
--- Core/Gui/test/Core.Gui.Test/UITypeEditors/SelectableMetaDataAttributeTest.cs	(.../SelectableMetaDataAttributeTest.cs)	(revision 9e9976818f1b446948c3bf815cafe2e023f98ac1)
+++ Core/Gui/test/Core.Gui.Test/UITypeEditors/SelectableMetaDataAttributeTest.cs	(.../SelectableMetaDataAttributeTest.cs)	(revision aac477d8a132304a11819bff90068340d0a74d64)
@@ -34,10 +34,10 @@
         public void Constructor_MetaDataAttributeNull_ThrowArgumentNullException()
         {
             // Call
-            TestDelegate test = () => new SelectableMetaDataAttribute(null);
+            void Call() => new SelectableMetaDataAttribute(null);
 
             // Assert
-            var exception = Assert.Throws<ArgumentNullException>(test);
+            var exception = Assert.Throws<ArgumentNullException>(Call);
             Assert.AreEqual("metaDataAttribute", exception.ParamName);
         }
 
@@ -62,14 +62,14 @@
             var selectableAttribute = new SelectableMetaDataAttribute(metaDataAttribute);
 
             // Call
-            string toString = selectableAttribute.ToString();
+            var toString = selectableAttribute.ToString();
 
             // Assert
             Assert.AreEqual(metaDataAttribute, toString);
         }
 
         [TestFixture]
-        private class SelectableMetaDataAttributeEqualsTest : EqualsTestFixture<SelectableMetaDataAttribute, DerivedSelectableMetaDataAttribute>
+        private class SelectableMetaDataAttributeEqualsTest : EqualsTestFixture<SelectableMetaDataAttribute>
         {
             private const string attribute = "attribute";
 
@@ -78,20 +78,10 @@
                 return new SelectableMetaDataAttribute(attribute);
             }
 
-            protected override DerivedSelectableMetaDataAttribute CreateDerivedObject()
-            {
-                return new DerivedSelectableMetaDataAttribute(attribute);
-            }
-
             private static IEnumerable<TestCaseData> GetUnequalTestCases()
             {
                 yield return new TestCaseData(new SelectableMetaDataAttribute("Different attribute name")).SetName("Attribute");
             }
         }
-
-        private class DerivedSelectableMetaDataAttribute : SelectableMetaDataAttribute
-        {
-            public DerivedSelectableMetaDataAttribute(string metaDataAttribute) : base(metaDataAttribute) {}
-        }
     }
 }
\ No newline at end of file
Index: Riskeer/Common/src/Riskeer.Common.Data/DikeProfiles/BreakWater.cs
===================================================================
diff -u -r9e9976818f1b446948c3bf815cafe2e023f98ac1 -raac477d8a132304a11819bff90068340d0a74d64
--- Riskeer/Common/src/Riskeer.Common.Data/DikeProfiles/BreakWater.cs	(.../BreakWater.cs)	(revision 9e9976818f1b446948c3bf815cafe2e023f98ac1)
+++ Riskeer/Common/src/Riskeer.Common.Data/DikeProfiles/BreakWater.cs	(.../BreakWater.cs)	(revision aac477d8a132304a11819bff90068340d0a74d64)
@@ -27,7 +27,7 @@
     /// <summary>
     /// Container for break water related data.
     /// </summary>
-    public class BreakWater : ICloneable
+    public sealed class BreakWater : ICloneable
     {
         private RoundedDouble height;
 
Index: Riskeer/Common/test/Riskeer.Common.Data.Test/DikeProfiles/BreakWaterTest.cs
===================================================================
diff -u -r9e9976818f1b446948c3bf815cafe2e023f98ac1 -raac477d8a132304a11819bff90068340d0a74d64
--- Riskeer/Common/test/Riskeer.Common.Data.Test/DikeProfiles/BreakWaterTest.cs	(.../BreakWaterTest.cs)	(revision 9e9976818f1b446948c3bf815cafe2e023f98ac1)
+++ Riskeer/Common/test/Riskeer.Common.Data.Test/DikeProfiles/BreakWaterTest.cs	(.../BreakWaterTest.cs)	(revision aac477d8a132304a11819bff90068340d0a74d64)
@@ -97,18 +97,13 @@
         }
 
         [TestFixture]
-        private class BreakWaterEqualsTest : EqualsTestFixture<BreakWater, DerivedBreakWater>
+        private class BreakWaterEqualsTest : EqualsTestFixture<BreakWater>
         {
             protected override BreakWater CreateObject()
             {
                 return CreateBreakWater();
             }
 
-            protected override DerivedBreakWater CreateDerivedObject()
-            {
-                return new DerivedBreakWater(CreateBreakWater());
-            }
-
             private static IEnumerable<TestCaseData> GetUnequalTestCases()
             {
                 BreakWater baseBreakWater = CreateBreakWater();
@@ -127,11 +122,5 @@
                 return new BreakWater(BreakWaterType.Caisson, 3.14);
             }
         }
-
-        private class DerivedBreakWater : BreakWater
-        {
-            public DerivedBreakWater(BreakWater breakWater)
-                : base(breakWater.Type, breakWater.Height) {}
-        }
     }
 }
\ No newline at end of file