start a restructure

Structural/Adapter/EBookAdapter.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace DesignPatterns\Adapter;
+
+/**
+ * EBookAdapter is an adapter to fit an e-book like a paper book
+ * 
+ * This is the adapter here. Notice it implements PaperBookInterface,
+ * therefore you don't have to change the code of the client which using paper book.
+ */
+class EBookAdapter implements PaperBookInterface
+{
+    /**
+     * @var EBookInterface
+     */
+    protected $eBook;
+
+    /**
+     * Notice the constructor, it "wraps" an electronic book
+     *
+     * @param EBookInterface $ebook
+     */
+    public function __construct(EBookInterface $ebook)
+    {
+        $this->eBook = $ebook;
+    }
+
+    /**
+     * This class makes the proper translation from one interface to another
+     */
+    public function open()
+    {
+        $this->eBook->pressStart();
+    }
+
+    /**
+     * turns pages
+     */
+    public function turnPage()
+    {
+        $this->eBook->pressNext();
+    }
+}