Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.IO/HydraulicBoundaryDatabase/HydraulicBoundaryDatabaseReader.cs
===================================================================
diff -u -re9961fad25fe961bf28281b004686b8d1bef593f -r7cf555dac4d0ea4187b0771e62a7fdd65ee10a92
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.IO/HydraulicBoundaryDatabase/HydraulicBoundaryDatabaseReader.cs	(.../HydraulicBoundaryDatabaseReader.cs)	(revision e9961fad25fe961bf28281b004686b8d1bef593f)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.IO/HydraulicBoundaryDatabase/HydraulicBoundaryDatabaseReader.cs	(.../HydraulicBoundaryDatabaseReader.cs)	(revision 7cf555dac4d0ea4187b0771e62a7fdd65ee10a92)
@@ -54,7 +54,7 @@
         /// <summary>
         /// Reads the hydraulic boundary database.
         /// </summary>
-        /// <returns>A read hydraulic boundary database.</returns>
+        /// <returns>A <see cref="ReadHydraulicBoundaryDatabase"/>.</returns>
         /// <exception cref="LineParseException">Thrown when the database contains incorrect values for required properties.</exception>
         /// <exception cref="CriticalFileReadException">Thrown when the data cannot be read.</exception>
         public ReadHydraulicBoundaryDatabase Read()
Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.IO/HydraulicLocationConfigurationDatabase/ReadHydraulicLocationConfigurationDatabase.cs
===================================================================
diff -u -r7035927ff4dd773500d6b0fbd1e5b0d2919e6021 -r7cf555dac4d0ea4187b0771e62a7fdd65ee10a92
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.IO/HydraulicLocationConfigurationDatabase/ReadHydraulicLocationConfigurationDatabase.cs	(.../ReadHydraulicLocationConfigurationDatabase.cs)	(revision 7035927ff4dd773500d6b0fbd1e5b0d2919e6021)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.IO/HydraulicLocationConfigurationDatabase/ReadHydraulicLocationConfigurationDatabase.cs	(.../ReadHydraulicLocationConfigurationDatabase.cs)	(revision 7cf555dac4d0ea4187b0771e62a7fdd65ee10a92)
@@ -19,7 +19,6 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
-using System;
 using System.Collections.Generic;
 
 namespace Ringtoets.HydraRing.IO.HydraulicLocationConfigurationDatabase
@@ -34,15 +33,8 @@
         /// </summary>
         /// <param name="locationIdMappings">The location id mappings of the read hydraulic location
         /// configuration database.</param>
-        /// <exception cref="ArgumentNullException">Thrown when <paramref name="locationIdMappings"/>
-        /// ic <c>null</c>.</exception>
         internal ReadHydraulicLocationConfigurationDatabase(IEnumerable<ReadHydraulicLocationMapping> locationIdMappings)
         {
-            if (locationIdMappings == null)
-            {
-                throw new ArgumentNullException(nameof(locationIdMappings));
-            }
-
             LocationIdMappings = locationIdMappings;
         }
 
Index: Ringtoets/HydraRing/test/Ringtoets.HydraRing.IO.Test/HydraulicLocationConfigurationDatabase/HydraulicLocationConfigurationDatabaseReaderTest.cs
===================================================================
diff -u -r87c8cbe523ecd4a197993251f0cf80b521cc3c20 -r7cf555dac4d0ea4187b0771e62a7fdd65ee10a92
--- Ringtoets/HydraRing/test/Ringtoets.HydraRing.IO.Test/HydraulicLocationConfigurationDatabase/HydraulicLocationConfigurationDatabaseReaderTest.cs	(.../HydraulicLocationConfigurationDatabaseReaderTest.cs)	(revision 87c8cbe523ecd4a197993251f0cf80b521cc3c20)
+++ Ringtoets/HydraRing/test/Ringtoets.HydraRing.IO.Test/HydraulicLocationConfigurationDatabase/HydraulicLocationConfigurationDatabaseReaderTest.cs	(.../HydraulicLocationConfigurationDatabaseReaderTest.cs)	(revision 7cf555dac4d0ea4187b0771e62a7fdd65ee10a92)
@@ -92,7 +92,7 @@
         }
 
         [Test]
-        public void Read_AmbiguousLocations_ReturnsFirstAndLogsWarning()
+        public void Read_AmbiguousLocations_ReturnsFirstLocationIdAndLogsWarning()
         {
             // Setup
             string dbFile = Path.Combine(testDataPath, "ambigousLocation.sqlite");
Index: Ringtoets/HydraRing/test/Ringtoets.HydraRing.IO.Test/HydraulicLocationConfigurationDatabase/ReadHydraulicLocationConfigurationDatabaseTest.cs
===================================================================
diff -u -rd4486a72798445a1fafc6bc5f0c68b69f379cec2 -r7cf555dac4d0ea4187b0771e62a7fdd65ee10a92
--- Ringtoets/HydraRing/test/Ringtoets.HydraRing.IO.Test/HydraulicLocationConfigurationDatabase/ReadHydraulicLocationConfigurationDatabaseTest.cs	(.../ReadHydraulicLocationConfigurationDatabaseTest.cs)	(revision d4486a72798445a1fafc6bc5f0c68b69f379cec2)
+++ Ringtoets/HydraRing/test/Ringtoets.HydraRing.IO.Test/HydraulicLocationConfigurationDatabase/ReadHydraulicLocationConfigurationDatabaseTest.cs	(.../ReadHydraulicLocationConfigurationDatabaseTest.cs)	(revision 7cf555dac4d0ea4187b0771e62a7fdd65ee10a92)
@@ -19,7 +19,6 @@
 // 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 NUnit.Framework;
@@ -31,17 +30,6 @@
     public class ReadHydraulicLocationConfigurationDatabaseTest
     {
         [Test]
-        public void Constructor_LocationIdMappingsNull_ThrowsArgumentNullException()
-        {
-            // Call
-            TestDelegate call = () => new ReadHydraulicLocationConfigurationDatabase(null);
-
-            // Assert
-            var exception = Assert.Throws<ArgumentNullException>(call);
-            Assert.AreEqual("locationIdMappings", exception.ParamName);
-        }
-
-        [Test]
         public void Constructor_ExpectedValues()
         {
             // Setup
Index: Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Importers/HydraulicBoundaryDatabaseImporterTest.cs
===================================================================
diff -u -rcaa6d8dab612fe88267e6bf6d0ffb5626544f683 -r7cf555dac4d0ea4187b0771e62a7fdd65ee10a92
--- Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Importers/HydraulicBoundaryDatabaseImporterTest.cs	(.../HydraulicBoundaryDatabaseImporterTest.cs)	(revision caa6d8dab612fe88267e6bf6d0ffb5626544f683)
+++ Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Importers/HydraulicBoundaryDatabaseImporterTest.cs	(.../HydraulicBoundaryDatabaseImporterTest.cs)	(revision 7cf555dac4d0ea4187b0771e62a7fdd65ee10a92)
@@ -432,9 +432,8 @@
             // Precondition
             Assert.IsTrue(File.Exists(validFilePath));
 
-            var importResult = true;
-
             // Call
+            var importResult = true;
             Action call = () => importResult = importer.Import();
 
             // Assert