Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/AssessmentSectionMerger.cs
===================================================================
diff -u -r03733ab29bedcd18c213b3d62b87080514a9a67b -rb57fef181580e4b78a36f2077d66389fc09803d9
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/AssessmentSectionMerger.cs	(.../AssessmentSectionMerger.cs)	(revision 03733ab29bedcd18c213b3d62b87080514a9a67b)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/AssessmentSectionMerger.cs	(.../AssessmentSectionMerger.cs)	(revision b57fef181580e4b78a36f2077d66389fc09803d9)
@@ -25,8 +25,8 @@
 using Core.Common.Gui;
 using log4net;
 using Ringtoets.Integration.Data;
+using Ringtoets.Integration.Data.Merge;
 using Ringtoets.Integration.Plugin.Properties;
-using Ringtoets.Integration.Service.Merge;
 using CoreCommonGuiResources = Core.Common.Gui.Properties.Resources;
 using RingtoetsStorageResources = Ringtoets.Storage.Core.Properties.Resources;
 
@@ -40,25 +40,33 @@
         private static readonly ILog log = LogManager.GetLogger(typeof(AssessmentSectionMerger));
 
         private readonly IInquiryHelper inquiryHandler;
-        private readonly IAssessmentSectionProvider assessmentSectionProvider;
+        private readonly Action<string, AssessmentSectionsOwner> getAssessmentSectionsAction;
+        private readonly AssessmentSectionsOwner assessmentSectionsOwner;
 
         /// <summary>
         /// Creates a new instance of <see cref="AssessmentSectionMerger"/>,
         /// </summary>
         /// <param name="inquiryHandler">Object responsible for inquiring the required data.</param>
-        /// <param name="assessmentSectionProvider">The provider for getting the assessment sections
+        /// <param name="getAssessmentSectionsAction">The action for getting the assessment sections
         /// to merge.</param>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="inquiryHandler"/>
         /// is <c>null</c>.</exception>
-        public AssessmentSectionMerger(IInquiryHelper inquiryHandler, IAssessmentSectionProvider assessmentSectionProvider)
+        public AssessmentSectionMerger(IInquiryHelper inquiryHandler, Action<string, AssessmentSectionsOwner> getAssessmentSectionsAction)
         {
             if (inquiryHandler == null)
             {
                 throw new ArgumentNullException(nameof(inquiryHandler));
             }
 
+            if (getAssessmentSectionsAction == null)
+            {
+                throw new ArgumentNullException(nameof(getAssessmentSectionsAction));
+            }
+
             this.inquiryHandler = inquiryHandler;
-            this.assessmentSectionProvider = assessmentSectionProvider;
+            this.getAssessmentSectionsAction = getAssessmentSectionsAction;
+
+            assessmentSectionsOwner = new AssessmentSectionsOwner();
         }
 
         public void StartMerge()
@@ -75,18 +83,29 @@
                 return;
             }
 
-            IEnumerable<AssessmentSection> assessmentSections = assessmentSectionProvider.GetAssessmentSections(filePath);
+            if (!GetAssessmentSections(filePath))
+            {
+                return;
+            }
+        }
 
+        private bool GetAssessmentSections(string filePath)
+        {
+            getAssessmentSectionsAction(filePath, assessmentSectionsOwner);
+            IEnumerable<AssessmentSection> assessmentSections = assessmentSectionsOwner.AssessmentSections;
+
             if (assessmentSections == null)
             {
-                return;
+                return false;
             }
 
             if (!assessmentSections.Any())
             {
                 LogError(Resources.AssessmentSectionMerger_No_matching_AssessmentSections);
-                return;
+                return false;
             }
+
+            return true;
         }
 
         private static void CancelMergeAndLog()
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs
===================================================================
diff -u -rd9d47cee30e2987819dfb5b8c0c935ee4a72e52a -rb57fef181580e4b78a36f2077d66389fc09803d9
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs	(.../RingtoetsPlugin.cs)	(revision d9d47cee30e2987819dfb5b8c0c935ee4a72e52a)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs	(.../RingtoetsPlugin.cs)	(revision b57fef181580e4b78a36f2077d66389fc09803d9)
@@ -275,7 +275,12 @@
 
             assessmentSectionFromFileCommandHandler = new AssessmentSectionFromFileCommandHandler(Gui.MainWindow, Gui, Gui.DocumentViewController);
             hydraulicBoundaryLocationCalculationGuiService = new HydraulicBoundaryLocationCalculationGuiService(Gui.MainWindow);
-            assessmentSectionMerger = new AssessmentSectionMerger(new InquiryMergeHelper(), new AssessmentSectionProviderStub(Gui.MainWindow));
+            assessmentSectionMerger = new AssessmentSectionMerger(new InquiryMergeHelper(),
+                                                                  (filePath, assessmentSectionOwner) =>
+                                                                  {
+                                                                      var provider = new AssessmentSectionProviderStub(Gui.MainWindow);
+                                                                      assessmentSectionOwner.AssessmentSections = provider.GetAssessmentSections(filePath);
+                                                                  });
 
             ribbonCommandHandler = new RingtoetsRibbon
             {
Index: Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/AssessmentSectionMergerTest.cs
===================================================================
diff -u -r03733ab29bedcd18c213b3d62b87080514a9a67b -rb57fef181580e4b78a36f2077d66389fc09803d9
--- Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/AssessmentSectionMergerTest.cs	(.../AssessmentSectionMergerTest.cs)	(revision 03733ab29bedcd18c213b3d62b87080514a9a67b)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/AssessmentSectionMergerTest.cs	(.../AssessmentSectionMergerTest.cs)	(revision b57fef181580e4b78a36f2077d66389fc09803d9)
@@ -26,7 +26,6 @@
 using NUnit.Framework;
 using Rhino.Mocks;
 using Ringtoets.Integration.Data;
-using Ringtoets.Integration.Service.Merge;
 
 namespace Ringtoets.Integration.Plugin.Test
 {
@@ -36,17 +35,28 @@
         [Test]
         public void Constructor_InquiryHandlerNull_ThrowsArgumentNullException()
         {
+            // Call
+            TestDelegate call = () => new AssessmentSectionMerger(null, (path, owner) => {});
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("inquiryHandler", exception.ParamName);
+        }
+
+        [Test]
+        public void Constructor_GetAssessmentSectionsActionNull_ThrowsArgumentNullException()
+        {
             // Setup
             var mocks = new MockRepository();
-            var assessmentSectionProvider = mocks.StrictMock<IAssessmentSectionProvider>();
+            var inquiryHelper = mocks.StrictMock<IInquiryHelper>();
             mocks.ReplayAll();
 
             // Call
-            TestDelegate call = () => new AssessmentSectionMerger(null, assessmentSectionProvider);
+            TestDelegate call = () => new AssessmentSectionMerger(inquiryHelper, null);
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(call);
-            Assert.AreEqual("inquiryHandler", exception.ParamName);
+            Assert.AreEqual("getAssessmentSectionsAction", exception.ParamName);
             mocks.VerifyAll();
         }
 
@@ -57,10 +67,9 @@
             var mocks = new MockRepository();
             var inquiryHelper = mocks.StrictMock<IInquiryHelper>();
             inquiryHelper.Expect(helper => helper.GetSourceFileLocation(null)).IgnoreArguments().Return(null);
-            var assessmentSectionProvider = mocks.StrictMock<IAssessmentSectionProvider>();
             mocks.ReplayAll();
 
-            var merger = new AssessmentSectionMerger(inquiryHelper, assessmentSectionProvider);
+            var merger = new AssessmentSectionMerger(inquiryHelper, (path, owner) => {});
 
             // Call
             Action call = () => merger.StartMerge();
@@ -71,17 +80,15 @@
         }
 
         [Test]
-        public void GivenValidFilePath_WhenAssessmentSectionProviderReturnNull_Abort()
+        public void GivenValidFilePath_WhenGetAssessmentSectionActionReturnNull_Abort()
         {
             // Setup
             var mocks = new MockRepository();
             var inquiryHelper = mocks.StrictMock<IInquiryHelper>();
             inquiryHelper.Expect(helper => helper.GetSourceFileLocation(null)).IgnoreArguments().Return(string.Empty);
-            var assessmentSectionProvider = mocks.StrictMock<IAssessmentSectionProvider>();
-            assessmentSectionProvider.Expect(asp => asp.GetAssessmentSections(null)).IgnoreArguments().Return(null);
             mocks.ReplayAll();
 
-            var merger = new AssessmentSectionMerger(inquiryHelper, assessmentSectionProvider);
+            var merger = new AssessmentSectionMerger(inquiryHelper, (path, owner) => {});
 
             // Call
             Action call = () => merger.StartMerge();
@@ -98,11 +105,9 @@
             var mocks = new MockRepository();
             var inquiryHelper = mocks.StrictMock<IInquiryHelper>();
             inquiryHelper.Expect(helper => helper.GetSourceFileLocation(null)).IgnoreArguments().Return(string.Empty);
-            var assessmentSectionProvider = mocks.StrictMock<IAssessmentSectionProvider>();
-            assessmentSectionProvider.Expect(asp => asp.GetAssessmentSections(null)).IgnoreArguments().Return(Enumerable.Empty<AssessmentSection>());
             mocks.ReplayAll();
 
-            var merger = new AssessmentSectionMerger(inquiryHelper, assessmentSectionProvider);
+            var merger = new AssessmentSectionMerger(inquiryHelper, (path, owner) => { owner.AssessmentSections = Enumerable.Empty<AssessmentSection>(); });
 
             // Call
             Action call = () => merger.StartMerge();