--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/BedDiffCalculation.java	Tue Jul 16 10:00:34 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/BedDiffCalculation.java	Tue Jul 16 10:43:59 2013 +0200
@@ -18,7 +18,10 @@
 import org.dive4elements.river.artifacts.model.Calculation;
 import org.dive4elements.river.artifacts.model.CalculationResult;
 
-
+/**
+ * Perform calculation of differences of bed height (german Sohlhoehe).
+ * The input are either single year data or epochs.
+ */
 public class BedDiffCalculation
 extends Calculation
 {
@@ -84,6 +87,7 @@
        */
     }
 
+    /** Get two BedHeights from factory. */
     private static BedHeight [] getHeightPair(int [] ids, String type) {
         return new BedHeight [] {
             BedHeightFactory.getHeight(type, ids[0], 0),