Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Create/HydraulicBoundaryLocationCreateExtensions.cs
===================================================================
diff -u -rc0532d07766ecad2566f7cfa4a97a9aeb6e8540c -rb3c727f0765a7658ebdef636b20fcc78abc11ed1
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Create/HydraulicBoundaryLocationCreateExtensions.cs	(.../HydraulicBoundaryLocationCreateExtensions.cs)	(revision c0532d07766ecad2566f7cfa4a97a9aeb6e8540c)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Create/HydraulicBoundaryLocationCreateExtensions.cs	(.../HydraulicBoundaryLocationCreateExtensions.cs)	(revision b3c727f0765a7658ebdef636b20fcc78abc11ed1)
@@ -78,7 +78,7 @@
         {
             if (output != null)
             {
-                var hydraulicLocationOutputEntity = output.Create<HydraulicLocationOutputEntity>(outputType);
+                var hydraulicLocationOutputEntity = HydraulicBoundaryLocationOutputCreateExtensions.CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity<HydraulicLocationOutputEntity>(outputType);
                 entity.HydraulicLocationOutputEntities.Add(hydraulicLocationOutputEntity);
             }
         }
@@ -132,7 +132,7 @@
             if (output != null)
             {
                 var grassCoverErosionOutwardsHydraulicLocationOutputEntity =
-                    output.Create<GrassCoverErosionOutwardsHydraulicLocationOutputEntity>(outputType);
+                    output.CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity(outputType);
 
                 entity.GrassCoverErosionOutwardsHydraulicLocationOutputEntities.Add(grassCoverErosionOutwardsHydraulicLocationOutputEntity);
             }
Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Create/HydraulicBoundaryLocationOutputCreateExtensions.cs
===================================================================
diff -u -r305b053dc83b31a9ea20e78ab6c0e6801d6085bf -rb3c727f0765a7658ebdef636b20fcc78abc11ed1
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Create/HydraulicBoundaryLocationOutputCreateExtensions.cs	(.../HydraulicBoundaryLocationOutputCreateExtensions.cs)	(revision 305b053dc83b31a9ea20e78ab6c0e6801d6085bf)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Create/HydraulicBoundaryLocationOutputCreateExtensions.cs	(.../HydraulicBoundaryLocationOutputCreateExtensions.cs)	(revision b3c727f0765a7658ebdef636b20fcc78abc11ed1)
@@ -19,30 +19,35 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using Application.Ringtoets.Storage.Create.IllustrationPoints;
 using Application.Ringtoets.Storage.DbContext;
 using Ringtoets.Common.Data.Hydraulics;
 
 namespace Application.Ringtoets.Storage.Create
 {
     /// <summary>
-    /// Extension methods for <see cref="HydraulicBoundaryLocationOutput"/> related to creating a <see cref="IHydraulicLocationOutputEntity"/>.
+    /// Extension methods for <see cref="HydraulicBoundaryLocationOutput"/> related to creating a hydraulic boundary location output entity.
     /// </summary>
     internal static class HydraulicBoundaryLocationOutputCreateExtensions
     {
         /// <summary>
-        /// Creates a <see cref="THydraulicLocationOutputEntity"/> based on the information of the <see cref="HydraulicBoundaryLocationOutput"/>.
+        /// Creates a <see cref="GrassCoverErosionOutwardsHydraulicLocationOutputEntity"/> based on the information of the <see cref="HydraulicBoundaryLocationOutput"/>.
         /// </summary>
-        /// <typeparam name="THydraulicLocationOutputEntity">The output entity type to create.</typeparam>
         /// <param name="output">The output to create a database entity for.</param>
         /// <param name="outputType">The calculation output type.</param>
-        /// <returns>A new <typeparamref name="THydraulicLocationOutputEntity"/> of output type <paramref name="outputType"/>.</returns>
-        internal static THydraulicLocationOutputEntity Create<THydraulicLocationOutputEntity>(this HydraulicBoundaryLocationOutput output,
-                                                                                              HydraulicLocationOutputType outputType)
-            where THydraulicLocationOutputEntity : IHydraulicLocationOutputEntity, new()
+        /// <returns>A new <see cref="GrassCoverErosionOutwardsHydraulicLocationOutputEntity"/>.</returns>
+        internal static GrassCoverErosionOutwardsHydraulicLocationOutputEntity CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity(this HydraulicBoundaryLocationOutput output,
+                                                                                                                                                    HydraulicLocationOutputType outputType)
+
         {
-            return new THydraulicLocationOutputEntity
+            if (output == null)
             {
+                throw new ArgumentNullException(nameof(output));
+            }
+
+            return new GrassCoverErosionOutwardsHydraulicLocationOutputEntity
+            {
                 HydraulicLocationOutputType = (byte) outputType,
                 Result = double.IsNaN(output.Result)
                              ? (double?) null
Fisheye: Tag b3c727f0765a7658ebdef636b20fcc78abc11ed1 refers to a dead (removed) revision in file `Application/Ringtoets/src/Application.Ringtoets.Storage/DbContext/PartialHydraulicLocationOutputEntity.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/HydraulicBoundaryLocationOutputCreateExtensionsTest.cs
===================================================================
diff -u -rdae8dd28223d61ff9d5ae061f77834aa74e94f6f -rb3c727f0765a7658ebdef636b20fcc78abc11ed1
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/HydraulicBoundaryLocationOutputCreateExtensionsTest.cs	(.../HydraulicBoundaryLocationOutputCreateExtensionsTest.cs)	(revision dae8dd28223d61ff9d5ae061f77834aa74e94f6f)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/HydraulicBoundaryLocationOutputCreateExtensionsTest.cs	(.../HydraulicBoundaryLocationOutputCreateExtensionsTest.cs)	(revision b3c727f0765a7658ebdef636b20fcc78abc11ed1)
@@ -47,7 +47,7 @@
             var outputType = random.NextEnumValue<HydraulicLocationOutputType>();
 
             // Call
-            var entity = output.Create<HydraulicLocationOutputEntity>(outputType);
+            GrassCoverErosionOutwardsHydraulicLocationOutputEntity entity = HydraulicBoundaryLocationOutputCreateExtensions.CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity<HydraulicLocationOutputEntity>(outputType);
 
             // Assert
             Assert.IsNotNull(entity);
@@ -73,7 +73,7 @@
             var outputType = random.NextEnumValue<HydraulicLocationOutputType>();
 
             // Call
-            var entity = output.Create<HydraulicLocationOutputEntity>(outputType);
+            GrassCoverErosionOutwardsHydraulicLocationOutputEntity entity = HydraulicBoundaryLocationOutputCreateExtensions.CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity<HydraulicLocationOutputEntity>(outputType);
 
             // Assert
             Assert.IsNotNull(entity);
@@ -100,7 +100,7 @@
             var outputType = random.NextEnumValue<HydraulicLocationOutputType>();
 
             // Call
-            var entity = output.Create<HydraulicLocationOutputEntity>(outputType);
+            GrassCoverErosionOutwardsHydraulicLocationOutputEntity entity = output.CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity<HydraulicLocationOutputEntity>(outputType);
 
             // Assert
             AssertGeneralResult(output.GeneralResult, entity.GeneralResultSubMechanismIllustrationPointEntity);
@@ -118,7 +118,7 @@
             var outputType = random.NextEnumValue<HydraulicLocationOutputType>();
 
             // Call
-            var entity = output.Create<GrassCoverErosionOutwardsHydraulicLocationOutputEntity>(outputType);
+            GrassCoverErosionOutwardsHydraulicLocationOutputEntity entity = output.CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity(outputType);
 
             // Assert
             Assert.IsNotNull(entity);
@@ -134,6 +134,21 @@
         }
 
         [Test]
+        public void CreateGrassCoverErosionOutwardsHydraulicLocationOutputEntity_HydraulicBoundaryLocationOutputNull_ThrowsArgumentNullException()
+        {
+            // Setup
+            var random = new Random(21);
+
+            // Call
+            TestDelegate call = () => 
+                ((HydraulicBoundaryLocationOutput) null).CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity(random.NextEnumValue<HydraulicLocationOutputType>());
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("output", exception.ParamName);
+        }
+
+        [Test]
         public void CreateGrassCoverErosionOutwardsHydraulicLocationOutputEntity_WithNaNParameters_ReturnsHydraulicLocationEntityWithOutputNaN()
         {
             // Setup
@@ -144,8 +159,8 @@
             var outputType = random.NextEnumValue<HydraulicLocationOutputType>();
 
             // Call
-            var entity = output.Create<GrassCoverErosionOutwardsHydraulicLocationOutputEntity>(
-                outputType);
+            GrassCoverErosionOutwardsHydraulicLocationOutputEntity entity = 
+                output.CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity(outputType);
 
             // Assert
             Assert.IsNotNull(entity);
@@ -173,7 +188,8 @@
             var outputType = random.NextEnumValue<HydraulicLocationOutputType>();
 
             // Call
-            var entity = output.Create<GrassCoverErosionOutwardsHydraulicLocationOutputEntity>(outputType);
+            GrassCoverErosionOutwardsHydraulicLocationOutputEntity entity = 
+                output.CreateGrassCoverErosionOutwardsHydraulicBoundaryLocationOutputEntity(outputType);
 
             // Assert
             AssertGeneralResult(output.GeneralResult, entity.GeneralResultSubMechanismIllustrationPointEntity);