--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/states/WaterlevelGroundDifferences.java	Fri Sep 05 12:54:58 2014 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/states/WaterlevelGroundDifferences.java	Fri Sep 05 12:58:17 2014 +0200
@@ -35,7 +35,7 @@
     public static final double DEFAULT_STEP = 0d;
 
 
-    private static Logger logger =
+    private static Logger log =
         Logger.getLogger(WaterlevelGroundDifferences.class);
 
 
@@ -88,7 +88,7 @@
             maxVal = minmax[1];
         }
         else {
-            logger.warn("Could not read min/max distance values!");
+            log.warn("Could not read min/max distance values!");
         }
 
         if (name.equals(LOWER_FIELD)) {
@@ -168,7 +168,7 @@
         double from,      double to
     ) throws IllegalArgumentException {
         if (to < 0d) {
-            logger.error(
+            log.error(
                 "Invalid 'to' " + to + " is lesser than zero.");
             throw new IllegalArgumentException("error_feed_from_out_of_range");
         }