Index: Ringtoets/Piping/src/Ringtoets.Piping.KernelWrapper/SubCalculator/ISellmeijerCalculator.cs
===================================================================
diff -u -rc2fe76d04e1517a4e0aaf62184bccd413de0e472 -r89488cc05b12fd5720cd28a4eeeb001dc9b1456d
--- Ringtoets/Piping/src/Ringtoets.Piping.KernelWrapper/SubCalculator/ISellmeijerCalculator.cs	(.../ISellmeijerCalculator.cs)	(revision c2fe76d04e1517a4e0aaf62184bccd413de0e472)
+++ Ringtoets/Piping/src/Ringtoets.Piping.KernelWrapper/SubCalculator/ISellmeijerCalculator.cs	(.../ISellmeijerCalculator.cs)	(revision 89488cc05b12fd5720cd28a4eeeb001dc9b1456d)
@@ -1,5 +1,26 @@
-using System.Collections.Generic;
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
 
+using System.Collections.Generic;
+
 namespace Ringtoets.Piping.KernelWrapper.SubCalculator
 {
     /// <summary>
@@ -8,82 +29,82 @@
     public interface ISellmeijerCalculator
     {
         /// <summary>
-        /// Sets the BeddingAngle property to use in the Sellmeijer calculation
+        /// Sets the BeddingAngle property to use in the Sellmeijer calculation.
         /// </summary>
         double BeddingAngle { set; }
 
         /// <summary>
-        /// Sets the D70 to use in the Sellmeijer calculation
+        /// Sets the D70 property to use in the Sellmeijer calculation.
         /// </summary>
         double D70 { set; }
 
         /// <summary>
-        /// Sets the D70Mean property to use in the Sellmeijer calculation
+        /// Sets the D70Mean property to use in the Sellmeijer calculation.
         /// </summary>
         double D70Mean { set; }
 
         /// <summary>
-        /// Sets the DAquifer property to use in the Sellmeijer calculation
+        /// Sets the DAquifer property to use in the Sellmeijer calculation.
         /// </summary>
         double DAquifer { set; }
 
         /// <summary>
-        /// Sets the DarcyPermeability property to use in the Sellmeijer calculation
+        /// Sets the DarcyPermeability property to use in the Sellmeijer calculation.
         /// </summary>
         double DarcyPermeability { set; }
 
         /// <summary>
-        /// Sets the DTotal property to use in the Sellmeijer calculation
+        /// Sets the DTotal property to use in the Sellmeijer calculation.
         /// </summary>
         double DTotal { set; }
 
         /// <summary>
-        /// Sets the GammaSubParticles property to use in the Sellmeijer calculation
+        /// Sets the GammaSubParticles property to use in the Sellmeijer calculation.
         /// </summary>
         double GammaSubParticles { set; }
 
         /// <summary>
-        /// Sets the Gravity property to use in the Sellmeijer calculation
+        /// Sets the Gravity property to use in the Sellmeijer calculation.
         /// </summary>
         double Gravity { set; }
 
         /// <summary>
-        /// Sets the HExit property to use in the Sellmeijer calculation
+        /// Sets the HExit property to use in the Sellmeijer calculation.
         /// </summary>
         double HExit { set; }
 
         /// <summary>
-        /// Sets the HRiver property to use in the Sellmeijer calculation
+        /// Sets the HRiver property to use in the Sellmeijer calculation.
         /// </summary>
         double HRiver { set; }
 
         /// <summary>
-        /// Sets the KinematicViscosityWater property to use in the Sellmeijer calculation
+        /// Sets the KinematicViscosityWater property to use in the Sellmeijer calculation.
         /// </summary>
         double KinematicViscosityWater { set; }
 
         /// <summary>
-        /// Sets the ModelFactorPiping property to use in the Sellmeijer calculation
+        /// Sets the ModelFactorPiping property to use in the Sellmeijer calculation.
         /// </summary>
         double ModelFactorPiping { set; }
 
         /// <summary>
-        /// Sets the Rc property to use in the Sellmeijer calculation
+        /// Sets the Rc property to use in the Sellmeijer calculation.
         /// </summary>
         double Rc { set; }
 
         /// <summary>
-        /// Sets the SeepageLength property to use in the Sellmeijer calculation
+        /// Sets the SeepageLength property to use in the Sellmeijer calculation.
         /// </summary>
         double SeepageLength { set; }
 
         /// <summary>
-        /// Sets the VolumetricWeightOfWater property to use in the Sellmeijer calculation
+        /// Sets the VolumetricWeightOfWater property to use in the Sellmeijer calculation.
         /// </summary>
         double VolumetricWeightOfWater { set; }
 
         /// <summary>
-        /// Sets the WhitesDragCoefficient property to use in the Sellmeijer calculation
+        /// Sets the WhitesDragCoefficient property to use in the Sellmeijer calculation.
         /// </summary>
         double WhitesDragCoefficient { set; }
 
@@ -105,6 +126,7 @@
         /// <summary>
         /// Performs the Sellmeijer validation.
         /// </summary>
+        /// <returns>A list of validation strings.</returns>
         List<string> Validate();
     }
 }
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