Code cleanup (#1461)

* Code cleanup

* Fix flux tests

* Fix checkstyle errors

* Fix compile error

model-view-controller/src/main/java/com/iluwatar/model/view/controller/Fatigue.java

@@ -30,7 +30,7 @@ public enum Fatigue {
 
   ALERT("alert"), TIRED("tired"), SLEEPING("sleeping");
 
-  private String title;
+  private final String title;
 
   Fatigue(String title) {
     this.title = title;

model-view-controller/src/main/java/com/iluwatar/model/view/controller/GiantController.java

@@ -28,8 +28,8 @@ package com.iluwatar.model.view.controller;
  */
 public class GiantController {
 
-  private GiantModel giant;
-  private GiantView view;
+  private final GiantModel giant;
+  private final GiantView view;
 
   public GiantController(GiantModel giant, GiantView view) {
     this.giant = giant;

model-view-controller/src/main/java/com/iluwatar/model/view/controller/Health.java

@@ -30,7 +30,7 @@ public enum Health {
 
   HEALTHY("healthy"), WOUNDED("wounded"), DEAD("dead");
 
-  private String title;
+  private final String title;
 
   Health(String title) {
     this.title = title;

model-view-controller/src/main/java/com/iluwatar/model/view/controller/Nourishment.java

@@ -30,7 +30,7 @@ public enum Nourishment {
 
   SATURATED("saturated"), HUNGRY("hungry"), STARVING("starving");
 
-  private String title;
+  private final String title;
 
   Nourishment(String title) {
     this.title = title;

model-view-controller/src/test/java/com/iluwatar/model/view/controller/GiantViewTest.java

@@ -75,7 +75,7 @@ public class GiantViewTest {
    * Logging Appender Implementation
    */
   public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
-    private List<ILoggingEvent> log = new LinkedList<>();
+    private final List<ILoggingEvent> log = new LinkedList<>();
 
     public InMemoryAppender(Class clazz) {
       ((Logger) LoggerFactory.getLogger(clazz)).addAppender(this);