--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/fixings/FixingsFacet.java	Thu Aug 16 15:47:10 2018 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/fixings/FixingsFacet.java	Thu Aug 16 16:27:53 2018 +0200
@@ -8,35 +8,27 @@
 
 package org.dive4elements.river.artifacts.model.fixings;
 
+import static org.dive4elements.river.exports.injector.InjectorConstants.CURRENT_KM;
+
 import org.dive4elements.artifacts.CallContext;
 import org.dive4elements.river.artifacts.model.DataFacet;
 import org.dive4elements.river.artifacts.states.DefaultState.ComputeType;
 
-import static org.dive4elements.river.exports.injector.InjectorConstants.CURRENT_KM;
 /**
  * Facet to access the current Km from the context safely
  *
  * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a>
  */
-public class FixingsFacet extends DataFacet {
+public abstract class FixingsFacet extends DataFacet {
+
+    private static final long serialVersionUID = 1L;
 
     public static final Double INVALID_KM = Double.valueOf(-1d);
 
     public FixingsFacet() {
     }
 
-    public  FixingsFacet(String name, String description) {
-        super(0, name, description, ComputeType.ADVANCE, null, null);
-    }
-
-    public FixingsFacet(
-            int         index,
-            String      name,
-            String      description,
-            ComputeType type,
-            String      hash,
-            String      stateId
-            ) {
+    public FixingsFacet(final int index, final String name, final String description, final ComputeType type, final String hash, final String stateId) {
         super(index, name, description, type, hash, stateId);
     }
 
@@ -44,17 +36,19 @@
      * Returns the current km from the context.
      * If the context is null or doesn't contain a currentKm
      * then a double value of -1 will be returned.
-     * @param context The CallContext instance
+     *
+     * @param context
+     *            The CallContext instance
      * @return the current km as double
      */
-    protected double getCurrentKm(CallContext context) {
+    protected final double getCurrentKm(final CallContext context) {
         if (context == null) {
             return INVALID_KM;
         }
-        Double dkm = (Double)context.getContextValue(CURRENT_KM);
+        final Double dkm = (Double) context.getContextValue(CURRENT_KM);
         if (dkm == null) {
             return INVALID_KM;
         }
         return dkm.doubleValue();
     }
-}
+}
\ No newline at end of file