Index: Ringtoets/Common/src/Ringtoets.Common.Data/UpdateDataStrategies/ReplaceDataStrategyBase.cs
===================================================================
diff -u -r9540d67453c6a1caf5833d64ab651660dce11595 -r42357a100d1a75baca233aa44b866a5009f48e00
--- Ringtoets/Common/src/Ringtoets.Common.Data/UpdateDataStrategies/ReplaceDataStrategyBase.cs	(.../ReplaceDataStrategyBase.cs)	(revision 9540d67453c6a1caf5833d64ab651660dce11595)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/UpdateDataStrategies/ReplaceDataStrategyBase.cs	(.../ReplaceDataStrategyBase.cs)	(revision 42357a100d1a75baca233aa44b866a5009f48e00)
@@ -44,13 +44,17 @@
         /// </summary>
         /// <param name="failureMechanism">The failure mechanism in which the target collection should be updated.</param>
         /// <param name="targetCollection">The collection that needs to be updated.</param>
-        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/> is <c>null</c>.</exception>
+        /// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
         protected ReplaceDataStrategyBase(TFailureMechanism failureMechanism, ObservableUniqueItemCollectionWithSourcePath<TTargetData> targetCollection)
         {
             if (failureMechanism == null)
             {
                 throw new ArgumentNullException(nameof(failureMechanism));
             }
+            if (targetCollection == null)
+            {
+                throw new ArgumentNullException(nameof(targetCollection));
+            }
 
             FailureMechanism = failureMechanism;
             this.targetCollection = targetCollection;