Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Parsers/IHydraRingFileParser.cs
===================================================================
diff -u -ra2f070e495d1ac6307fe0267d58aade65f35a5d8 -r557c60f6aadb50bcb07503a0f5a1ea34ca6a3885
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Parsers/IHydraRingFileParser.cs	(.../IHydraRingFileParser.cs)	(revision a2f070e495d1ac6307fe0267d58aade65f35a5d8)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Parsers/IHydraRingFileParser.cs	(.../IHydraRingFileParser.cs)	(revision 557c60f6aadb50bcb07503a0f5a1ea34ca6a3885)
@@ -1,4 +1,6 @@
-namespace Ringtoets.HydraRing.Calculation.Parsers
+using System;
+
+namespace Ringtoets.HydraRing.Calculation.Parsers
 {
     /// <summary>
     /// This interface describes components that obtain results from the output files of a Hydra-Ring calculation.
@@ -10,6 +12,13 @@
         /// </summary>
         /// <param name="workingDirectory">The path to the directory which contains the output of the Hydra-Ring type I calculation.</param>
         /// <param name="sectionId">The section id to get the output for.</param>
+        /// <exception cref="ArgumentNullException">Thrown when the <paramref name="workingDirectory"/> is <c>null</c>.</exception>
+        /// <exception cref="ArgumentException">Thrown when 
+        /// 
+        /// <list type="bullet">
+        /// <item><paramref name="workingDirectory"/> contains illegal characters,</item>
+        /// <item>or consists out of only whitespace characters.</item>
+        /// </list></exception>
         void Parse(string workingDirectory, int sectionId);
     }
 }
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