Index: Ringtoets/Revetment/src/Ringtoets.Revetment.IO/Configurations/WaveConditionsCalculationConfigurationWriter.cs
===================================================================
diff -u -r149e6442b209c1971ec1d885766ed2392928abce -r0e275bef3e8fe6357f21ffb81746e9db72be6845
--- Ringtoets/Revetment/src/Ringtoets.Revetment.IO/Configurations/WaveConditionsCalculationConfigurationWriter.cs	(.../WaveConditionsCalculationConfigurationWriter.cs)	(revision 149e6442b209c1971ec1d885766ed2392928abce)
+++ Ringtoets/Revetment/src/Ringtoets.Revetment.IO/Configurations/WaveConditionsCalculationConfigurationWriter.cs	(.../WaveConditionsCalculationConfigurationWriter.cs)	(revision 0e275bef3e8fe6357f21ffb81746e9db72be6845)
@@ -33,7 +33,7 @@
     /// to XML format.
     /// </summary>
     /// <typeparam name="T">The type of configuration.</typeparam>
-    public class WaveConditionsCalculationConfigurationWriter<T> : CalculationConfigurationWriter<T>
+    public abstract class WaveConditionsCalculationConfigurationWriter<T> : CalculationConfigurationWriter<T>
         where T: WaveConditionsCalculationConfiguration
     {
         /// <summary>
@@ -48,7 +48,7 @@
         /// <item>does not contain an invalid character,</item>
         /// <item>does not end with a directory or path separator (empty file name).</item>
         /// </list></remarks>
-        public WaveConditionsCalculationConfigurationWriter(string filePath)
+        protected WaveConditionsCalculationConfigurationWriter(string filePath)
             : base(filePath) {}
 
         protected override void WriteCalculation(T configuration, XmlWriter writer)