implementato parzialmente la deque

deque/NodeDeque.java

@@ -0,0 +1,52 @@
+package deque;
+
+import exceptions.EmptyDequeException;
+
+/**
+ * Created with xgiovio.macbookair.
+ * User: xgiovio
+ * Date: 17/03/14
+ * Time: 16:26
+ */
+public class NodeDeque<E> implements Deque <E>  {
+
+    @Override
+    public int size() {
+        return 0;
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return false;
+    }
+
+    @Override
+    public E getFirst() throws EmptyDequeException {
+        return null;
+    }
+
+    @Override
+    public E getLast() throws EmptyDequeException {
+        return null;
+    }
+
+    @Override
+    public void addFirst(E element) {
+
+    }
+
+    @Override
+    public void addLast(E element) {
+
+    }
+
+    @Override
+    public E removeFirst() throws EmptyDequeException {
+        return null;
+    }
+
+    @Override
+    public E removeLast() throws EmptyDequeException {
+        return null;
+    }
+}