Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Parsers/ExceedanceProbabilityCalculationParser.cs
===================================================================
diff -u -rb253fd5ebc5d5800f5757be8b04820cb4ca05724 -r9bc5d8bc179ba0be25c9746859da3726b8b6a33e
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Parsers/ExceedanceProbabilityCalculationParser.cs	(.../ExceedanceProbabilityCalculationParser.cs)	(revision b253fd5ebc5d5800f5757be8b04820cb4ca05724)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Parsers/ExceedanceProbabilityCalculationParser.cs	(.../ExceedanceProbabilityCalculationParser.cs)	(revision 9bc5d8bc179ba0be25c9746859da3726b8b6a33e)
@@ -26,7 +26,7 @@
 namespace Ringtoets.HydraRing.Calculation.Parsers
 {
     /// <summary>
-    /// Parser for the output of Hydra-Ring calculations that compute a probability of failure.
+    /// Parser for the probability of failure of Hydra-Ring calculations.
     /// </summary>
     public class ExceedanceProbabilityCalculationParser : IHydraRingFileParser
     {
@@ -46,11 +46,6 @@
 
         public void Parse(string workingDirectory, int sectionId)
         {
-            if (workingDirectory == null)
-            {
-                throw new ArgumentNullException(nameof(workingDirectory));
-            }
-
             HydraRingDatabaseParseHelper.Parse(workingDirectory,
                                                query,
                                                sectionId,
@@ -62,7 +57,7 @@
         /// Reads the result of the <paramref name="reader"/>.
         /// </summary>
         /// <param name="reader">The reader to get the result from.</param>
-        /// <exception cref="InvalidCastException">Thrown when the the result
+        /// <exception cref="InvalidCastException">Thrown when the result
         /// cannot be converted to the output format.</exception>
         private void ReadResult(HydraRingDatabaseReader reader)
         {