Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/RoughnessProfileSection.cs
===================================================================
diff -u -rd2de88a141d3ba20d1f3b301a3c38723b682b206 -rdec46d5efaad5332ffb2a96e67ec11209ddc5515
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/RoughnessProfileSection.cs	(.../RoughnessProfileSection.cs)	(revision d2de88a141d3ba20d1f3b301a3c38723b682b206)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/RoughnessProfileSection.cs	(.../RoughnessProfileSection.cs)	(revision dec46d5efaad5332ffb2a96e67ec11209ddc5515)
@@ -25,9 +25,9 @@
 namespace Ringtoets.GrassCoverErosionInwards.Data
 {
     /// <summary>
-    /// This class represents a sub-section of a line and the characteristic properties of that line.
+    /// This class represents a sub-section of a line and the characteristic properties of that line with a roughness.
     /// </summary>
-    public class RoughnessProfileSection
+    public class RoughnessProfileSection : ProfileSection
     {
         /// <summary>
         /// Creates a new instance of the <see cref="RoughnessProfileSection"/> class.
@@ -39,32 +39,12 @@
         /// <item><paramref name="startingPoint"/> is <c>null</c>.</item>
         /// <item><paramref name="endingPoint"/> is <c>null</c>.</item>
         /// </list></exception>
-        public RoughnessProfileSection(Point2D startingPoint, Point2D endingPoint, double roughness)
+        public RoughnessProfileSection(Point2D startingPoint, Point2D endingPoint, double roughness) : base(startingPoint, endingPoint)
         {
-            if (startingPoint == null)
-            {
-                throw new ArgumentNullException("startingPoint");
-            }
-            if (endingPoint == null)
-            {
-                throw new ArgumentNullException("endingPoint");
-            }
-            StartingPoint = startingPoint;
-            EndingPoint = endingPoint;
             Roughness = roughness;
         }
 
         /// <summary>
-        /// Gets the starting 2D geometry point of the <see cref="RoughnessProfileSection"/>.
-        /// </summary>
-        public Point2D StartingPoint { get; private set; }
-
-        /// <summary>
-        /// Gets the ending 2D geometry point of the <see cref="RoughnessProfileSection"/>.
-        /// </summary>
-        public Point2D EndingPoint { get; private set; }
-
-        /// <summary>
         /// Gets the roughness of the <see cref="RoughnessProfileSection"/>.
         /// </summary>
         public double Roughness { get; private set; }