Index: Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.IO/Factories/MacroStabilityInwardsExportRegistry.cs
===================================================================
diff -u -r39badf1bffd27f78e31ce928a4918c0633af5c43 -rab93864f0b8a15f2d9a62722ab00fffb8cf609ed
--- Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.IO/Factories/MacroStabilityInwardsExportRegistry.cs	(.../MacroStabilityInwardsExportRegistry.cs)	(revision 39badf1bffd27f78e31ce928a4918c0633af5c43)
+++ Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.IO/Factories/MacroStabilityInwardsExportRegistry.cs	(.../MacroStabilityInwardsExportRegistry.cs)	(revision ab93864f0b8a15f2d9a62722ab00fffb8cf609ed)
@@ -37,6 +37,7 @@
         private readonly Dictionary<MacroStabilityInwardsExportStageType, Dictionary<MacroStabilityInwardsSoilLayer2D, string>> geometryLayers;
         private readonly Dictionary<MacroStabilityInwardsExportStageType, string> soilLayers;
         private readonly Dictionary<MacroStabilityInwardsExportStageType, string> waternets;
+        private readonly Dictionary<MacroStabilityInwardsExportStageType, string> waternetCreatorSettings;
 
         /// <summary>
         /// Creates a new instance of <see cref="MacroStabilityInwardsExportRegistry"/>.
@@ -49,6 +50,7 @@
             geometryLayers = new Dictionary<MacroStabilityInwardsExportStageType, Dictionary<MacroStabilityInwardsSoilLayer2D, string>>();
             soilLayers = new Dictionary<MacroStabilityInwardsExportStageType, string>();
             waternets = new Dictionary<MacroStabilityInwardsExportStageType, string>();
+            waternetCreatorSettings = new Dictionary<MacroStabilityInwardsExportStageType, string>();
         }
 
         /// <summary>
@@ -80,6 +82,11 @@
         /// Gets the waternets and their unique identifiers.
         /// </summary>
         public IReadOnlyDictionary<MacroStabilityInwardsExportStageType, string> Waternets => waternets;
+        
+        /// <summary>
+        /// Gets the waternet creator settings and their unique identifiers.
+        /// </summary>
+        public IReadOnlyDictionary<MacroStabilityInwardsExportStageType, string> WaternetCreatorSettings => waternetCreatorSettings;
 
         /// <summary>
         /// Adds calculation settings to the registry.
@@ -187,6 +194,21 @@
         }
 
         /// <summary>
+        /// Adds waternet creator settings to the register.
+        /// </summary>
+        /// <param name="stageType">The <see cref="MacroStabilityInwardsExportStageType"/>
+        /// to register the waternet creator settings for.</param>
+        /// <param name="id">The id of the waternet creator settings.</param>
+        /// <exception cref="InvalidEnumArgumentException">Thrown when <paramref name="stageType"/>
+        /// has an invalid value.</exception>
+        public void AddWaternetCreatorSettings(MacroStabilityInwardsExportStageType stageType, string id)
+        {
+            ValidateStageType(stageType);
+
+            waternetCreatorSettings.Add(stageType, id);
+        }
+
+        /// <summary>
         /// Validates the <see cref="MacroStabilityInwardsExportStageType"/>.
         /// </summary>
         /// <param name="stageType">The stage type to validate.</param>
Index: Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.IO.Test/Factories/MacroStabilityInwardsExportRegistryTest.cs
===================================================================
diff -u -r39badf1bffd27f78e31ce928a4918c0633af5c43 -rab93864f0b8a15f2d9a62722ab00fffb8cf609ed
--- Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.IO.Test/Factories/MacroStabilityInwardsExportRegistryTest.cs	(.../MacroStabilityInwardsExportRegistryTest.cs)	(revision 39badf1bffd27f78e31ce928a4918c0633af5c43)
+++ Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.IO.Test/Factories/MacroStabilityInwardsExportRegistryTest.cs	(.../MacroStabilityInwardsExportRegistryTest.cs)	(revision ab93864f0b8a15f2d9a62722ab00fffb8cf609ed)
@@ -47,6 +47,7 @@
             CollectionAssert.IsEmpty(registry.GeometryLayers);
             CollectionAssert.IsEmpty(registry.SoilLayers);
             CollectionAssert.IsEmpty(registry.Waternets);
+            CollectionAssert.IsEmpty(registry.WaternetCreatorSettings);
         }
 
         [Test]
@@ -306,5 +307,38 @@
             Assert.AreEqual(stageType, registeredWaternets.Key);
             Assert.AreEqual(id, registeredWaternets.Value);
         }
+
+        [Test]
+        public void AddWaternetCreatorSettings_InvalidStageType_ThrowsInvalidEnumArgumentException()
+        {
+            // Setup
+            var registry = new MacroStabilityInwardsExportRegistry();
+            const MacroStabilityInwardsExportStageType stageType = (MacroStabilityInwardsExportStageType)99;
+
+            // Call
+            void Call() => registry.AddWaternetCreatorSettings(stageType, "1");
+
+            // Assert
+            string expectedMessage = $"The value of argument '{nameof(stageType)}' ({stageType}) is invalid for Enum type '{nameof(MacroStabilityInwardsExportStageType)}'.";
+            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<InvalidEnumArgumentException>(Call, expectedMessage);
+        }
+
+        [Test]
+        public void AddWaternetCreatorSettings_WithWaternetCreatorSettings_AddsWaternetCreatorSettings()
+        {
+            // Setup
+            var registry = new MacroStabilityInwardsExportRegistry();
+            var stageType = new Random(21).NextEnumValue<MacroStabilityInwardsExportStageType>();
+            const string id = "1";
+
+            // Call
+            registry.AddWaternetCreatorSettings(stageType, id);
+
+            // Assert
+            Assert.AreEqual(1, registry.WaternetCreatorSettings.Count);
+            KeyValuePair<MacroStabilityInwardsExportStageType, string> registeredWaternetCreatorSettings = registry.WaternetCreatorSettings.Single();
+            Assert.AreEqual(stageType, registeredWaternetCreatorSettings.Key);
+            Assert.AreEqual(id, registeredWaternetCreatorSettings.Value);
+        }
     }
 }
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