Code cleaning. Ref #69

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/AllTerrainNode.java

@@ -7,7 +7,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class AllTerrainNode extends Renderable {
 	
-	private List<CityObject> land;
+	private final List<CityObject> land;
 	
 	public AllTerrainNode(List<CityObject> land) {
 		this.land = land;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/AllTransportationNode.java

@@ -7,7 +7,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class AllTransportationNode extends Renderable {
 	
-	private List<TransportationObject> transportation;
+	private final List<TransportationObject> transportation;
 	
 	public AllTransportationNode(List<TransportationObject> transportation) {
 		this.transportation = transportation;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/AllVegetationNode.java

@@ -7,7 +7,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class AllVegetationNode extends Renderable {
 	
-	private List<Vegetation> vegetation;
+	private final List<Vegetation> vegetation;
 	
 	public AllVegetationNode(List<Vegetation> vegetation) {
 		this.vegetation = vegetation;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/AllWaterNode.java

@@ -7,7 +7,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class AllWaterNode extends Renderable {
 	
-	private List<WaterObject> water;
+	private final List<WaterObject> water;
 	
 	public AllWaterNode(List<WaterObject> water) {
 		this.water = water;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/BoundarySurfaceNode.java

@@ -6,7 +6,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class BoundarySurfaceNode extends Renderable {
 
-	private BoundarySurface bs;
+	private final BoundarySurface bs;
 
 	public BoundarySurfaceNode(BoundarySurface bs) {
 		this.bs = bs;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/BridgeConstructiveElementNode.java

@@ -24,7 +24,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class BridgeConstructiveElementNode extends Renderable {
 	
-	private BridgeConstructiveElement bce;
+	private final BridgeConstructiveElement bce;
 
 	public BridgeConstructiveElementNode(BridgeConstructiveElement bce) {
 		this.bce = bce;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/BridgeNode.java

@@ -24,7 +24,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class BridgeNode extends Renderable {
 	
-	private BridgeObject bridge;
+	private final BridgeObject bridge;
 
 	public BridgeNode(BridgeObject bridge) {
 		this.bridge = bridge;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/BuildingNode.java

@@ -6,7 +6,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class BuildingNode extends Renderable {
 
-	private Building building;
+	private final Building building;
 
 	public BuildingNode(Building building) {
 		this.building = building;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/BuildingPartNode.java

@@ -6,7 +6,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class BuildingPartNode extends Renderable {
 
-	private BuildingPart bp;
+	private final BuildingPart bp;
 
 	public BuildingPartNode(BuildingPart bp) {
 		this.bp = bp;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/ButtonRenderable.java

@@ -22,7 +22,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class ButtonRenderable extends Renderable {
 	
-	private Runnable run;
+	private final Runnable run;
 	
 	public ButtonRenderable(Runnable run) {
 		this.run = run;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/CityObjectNode.java

@@ -6,7 +6,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class CityObjectNode extends Renderable {
 
-	private CityObject co;
+	private final CityObject co;
 
 	public CityObjectNode(CityObject co) {
 		this.co = co;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/EdgeNode.java

@@ -9,7 +9,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class EdgeNode extends Renderable {
 	
-	private static DecimalFormat nf;
+	private static final DecimalFormat nf;
 	
 	static {
 		DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance();
@@ -18,7 +18,7 @@ public class EdgeNode extends Renderable {
 	}
 	
 	private static final String SEPERATOR = ", ";
-	private Edge e;
+	private final Edge e;
 	private String text;
 	
 	public EdgeNode(Edge e) {

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/ErrorItemVisitor.java

@@ -49,7 +49,7 @@ public class ErrorItemVisitor implements ErrorVisitor {
 	
 	private static final String NAME_OF_ATTRIBUTE = "Name of Attribute: ";
 	private static final String CHILD_ID = "ChildId: ";
-	private TreeItem<Renderable> root;
+	private final TreeItem<Renderable> root;
 
 	public ErrorItemVisitor(TreeItem<Renderable> root) {
 		this.root = root;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/ErrorNode.java

@@ -5,7 +5,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class ErrorNode extends Renderable {
 	
-	private CheckError err;
+	private final CheckError err;
 	
 	public ErrorNode(CheckError e) {
 		this.err = e;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/GeometryNode.java

@@ -6,8 +6,8 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class GeometryNode extends Renderable {
 
-	private Geometry geom;
-	private String text;
+	private final Geometry geom;
+	private final String text;
 
 	public GeometryNode(Geometry geom) {
 		this.geom = geom;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/InstallationNode.java

@@ -6,7 +6,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class InstallationNode extends Renderable {
 
-	private Installation bi;
+	private final Installation bi;
 
 	public InstallationNode(Installation bi) {
 		this.bi = bi;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/LandUseNode.java

@@ -24,7 +24,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class LandUseNode extends Renderable {
 	
-	private LandObject landUse;
+	private final LandObject landUse;
 
 	public LandUseNode(LandObject landUse) {
 		this.landUse = landUse;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/LinearRingNode.java

@@ -6,7 +6,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class LinearRingNode extends Renderable {
 
-	private LinearRing lr;
+	private final LinearRing lr;
 	private String text;
 
 	public LinearRingNode(LinearRing lr, CheckStatus cs) {

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/OpeningNode.java

@@ -6,7 +6,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class OpeningNode extends Renderable {
 
-	private Opening opening;
+	private final Opening opening;
 
 	public OpeningNode(Opening o) {
 		opening = o;

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/PolygonNode.java

@@ -6,7 +6,7 @@ import de.hft.stuttgart.citydoctor2.gui.Renderer;
 
 public class PolygonNode extends Renderable {
 
-	private Polygon p;
+	private final Polygon p;
 	private String text;
 
 	public PolygonNode(Polygon p, CheckStatus cs) {