--- a/artifacts/src/main/java/org/dive4elements/river/utils/GaugeIndex.java	Tue Jul 24 16:55:43 2018 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/utils/GaugeIndex.java	Tue Jul 24 18:51:47 2018 +0200
@@ -1,6 +1,6 @@
 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
- * Software engineering by 
- *  Björnsen Beratende Ingenieure GmbH 
+ * Software engineering by
+ *  Björnsen Beratende Ingenieure GmbH
  *  Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
  *
  * This file is Free Software under the GNU AGPL (>=v3)
@@ -18,35 +18,39 @@
  * @author Gernot Belger
  */
 public class GaugeIndex {
-	private List<Gauge> gauges;
-	
-	private Gauge lastGauge = null;
-
-	public GaugeIndex( List<Gauge> gauges) {
-		this.gauges = gauges;
-	}
-	
-	public Gauge findGauge(double km) {
+    private final List<Gauge> gauges;
 
-		// REMARK: this is code copied from WaterlevelExporter, which is honestly not very fast/good.
-		// Instead we need to index by range with an RTree and directly acccess the right gauge.
-		
-		if( lastGauge != null && lastGauge.getRange().contains(km) )
-			return lastGauge;
-		
-		final Gauge gauge = findGauge(km, gauges);
+    private Gauge lastGauge = null;
 
-        lastGauge = gauge;
-            
+    public GaugeIndex(final List<Gauge> gauges) {
+        this.gauges = gauges;
+    }
+
+    public Gauge findGauge(final double km) {
+
+        // REMARK: this is code copied from WaterlevelExporter, which is honestly not very fast/good.
+        // Instead we need to index by range with an RTree and directly acccess the right gauge.
+
+        if( this.lastGauge != null && this.lastGauge.getRange().contains(km) )
+            return this.lastGauge;
+
+        final Gauge gauge = findGauge(km, this.gauges);
+
+        this.lastGauge = gauge;
+
         return gauge;
-	}
-	
-    private static Gauge findGauge(double km, List<Gauge> gauges) {
-        for (Gauge gauge: gauges) {
+    }
+
+    private static Gauge findGauge(final double km, final List<Gauge> gauges) {
+        for (final Gauge gauge: gauges) {
             if (gauge.getRange().contains(km)) {
                 return gauge;
             }
         }
         return null;
     }
+
+    public List<Gauge> getGauges() {
+        return this.gauges;
+    }
 }
\ No newline at end of file