Merge pull request #384 from DevFactory/release/Redundant-Field-Initializer-fix-1

pmd:RedundantFieldInitializer - Redundant-Field-Initializer

caching/src/main/java/com/iluwatar/caching/CacheStore.java

@@ -31,7 +31,7 @@ import java.util.ArrayList;
  */
 public class CacheStore {
 
-  static LruCache cache = null;
+  static LruCache cache;
 
   private CacheStore() {
   }

caching/src/main/java/com/iluwatar/caching/LruCache.java

@@ -50,8 +50,8 @@ public class LruCache {
 
   int capacity;
   HashMap<String, Node> cache = new HashMap<>();
-  Node head = null;
-  Node end = null;
+  Node head;
+  Node end;
 
   public LruCache(int capacity) {
     this.capacity = capacity;