Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.IO/ClosingStructuresImporter.cs
===================================================================
diff -u -rce36fdd8e9af2866739cc67c82ea820f51533777 -r575800d75878f201a36f9cb96bc575e25930f0c3
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.IO/ClosingStructuresImporter.cs	(.../ClosingStructuresImporter.cs)	(revision ce36fdd8e9af2866739cc67c82ea820f51533777)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.IO/ClosingStructuresImporter.cs	(.../ClosingStructuresImporter.cs)	(revision 575800d75878f201a36f9cb96bc575e25930f0c3)
@@ -81,6 +81,17 @@
             return closingStructures;
         }
 
+        /// <summary>
+        /// Creates a <see cref="ClosingStructure"/> based on the <paramref name="structureLocation"/>
+        /// and property values defined by <paramref name="structureParameterRows"/>.
+        /// </summary>
+        /// <param name="structureLocation">The representation of the structure.</param>
+        /// <param name="structureParameterRows">The parameters of the structure.</param>
+        /// <returns>A <see cref="ClosingStructure"/>.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="structureParameterRows"/>
+        /// contains an element with <see cref="StructuresParameterRow.ParameterId"/> is <c>null</c>.</exception>
+        /// <exception cref="ArgumentException">Thrown when <paramref name="structureParameterRows"/>
+        /// contains a parameter definition with a duplicate name.</exception>
         private ClosingStructure CreateClosingStructure(StructureLocation structureLocation,
                                                         IEnumerable<StructuresParameterRow> structureParameterRows)
         {