Index: Ringtoets/Common/src/Ringtoets.Common.Data/Structures/StructuresCalculation.cs
===================================================================
diff -u -rd49a06fcbf63b36885b0d8f09a01f6539bcbfd56 -r7c3056aafbb670d79d239ef3d38e9d942bc33498
--- Ringtoets/Common/src/Ringtoets.Common.Data/Structures/StructuresCalculation.cs	(.../StructuresCalculation.cs)	(revision d49a06fcbf63b36885b0d8f09a01f6539bcbfd56)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Structures/StructuresCalculation.cs	(.../StructuresCalculation.cs)	(revision 7c3056aafbb670d79d239ef3d38e9d942bc33498)
@@ -38,6 +38,7 @@
         {
             InputParameters = new T();
             Name = Resources.Calculation_DefaultName;
+            Comments = new Commentable();
         }
 
         /// <summary>
@@ -53,7 +54,7 @@
 
         public string Name { get; set; }
 
-        public string Comments { get; set; }
+        public Commentable Comments { get; private set; }
 
         public bool HasOutput
         {