--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/access/BedQualityAccess.java	Tue Jun 11 09:12:35 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/access/BedQualityAccess.java	Tue Jun 11 09:14:12 2013 +0200
@@ -8,6 +8,7 @@
 
 package org.dive4elements.river.artifacts.access;
 
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.LinkedList;
 import java.util.List;
@@ -48,6 +49,9 @@
         if (bedDiameter == null && value != null) {
             bedDiameter = extractDiameter(value);
         }
+        if (bedDiameter == null) {
+            return new ArrayList<String>();
+        }
         return bedDiameter;
     }
 
@@ -56,6 +60,9 @@
         if (bedloadDiameter == null && value != null) {
             bedloadDiameter = extractDiameter(value);
         }
+        if (bedloadDiameter == null) {
+            return new ArrayList<String>();
+        }
         return bedloadDiameter;
     }