--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/states/WaterlevelData.java	Thu Aug 02 11:47:49 2018 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/states/WaterlevelData.java	Thu Aug 02 15:02:27 2018 +0200
@@ -29,13 +29,13 @@
     /** If <code>true</code>, tabular export will show gauges for every station, else only for the first gauge */
     private final boolean showAllGauges;
 
-    private boolean showRefGauges;
+    private final boolean showRefGauges;
 
-    public WaterlevelData(final WKms wkms, final int year, final boolean showAllGauges, boolean showRefGauges) {
+    public WaterlevelData(final WKms wkms, final int year, final boolean showAllGauges, final boolean showRefGauges) {
         this(wkms.getName(), wkms, year, showAllGauges, showRefGauges);
     }
 
-    private WaterlevelData(final String name, final WKms wkms, final int year, final boolean showAllGauges, boolean showRefGauges) {
+    private WaterlevelData(final String name, final WKms wkms, final int year, final boolean showAllGauges, final boolean showRefGauges) {
         this.name = name;
         this.wkms = wkms;
         this.year = year;
@@ -49,11 +49,11 @@
         }
 
         final WKms filteredWkms = this.wkms.filteredKms(from, to);
-        return new WaterlevelData(this.name, filteredWkms, this.year, this.showAllGauges ,showRefGauges);
+        return new WaterlevelData(this.name, filteredWkms, this.year, this.showAllGauges, this.showRefGauges);
     }
 
     public WaterlevelData withName(final String nameToSet) {
-        return new WaterlevelData(nameToSet, this.wkms, this.year, this.showAllGauges, showRefGauges);
+        return new WaterlevelData(nameToSet, this.wkms, this.year, this.showAllGauges, this.showRefGauges);
     }
 
     public String getName() {
@@ -67,7 +67,7 @@
     public boolean isShowAllGauges() {
         return this.showAllGauges;
     }
-    
+
     public boolean isShowRefGauges() {
         return this.showRefGauges;
     }