diff --git a/Adapter/Book.php b/Adapter/Book.php
index dcd3b0f..d993891 100644
--- a/Adapter/Book.php
+++ b/Adapter/Book.php
@@ -1,9 +1,5 @@
 <?php
 
-/*
- * DesignPatternPHP
- */
-
 namespace DesignPatterns\Adapter;
 
 /**
@@ -11,15 +7,19 @@ namespace DesignPatterns\Adapter;
  */
 class Book implements PaperBookInterface
 {
-
+    /**
+     * {@inheritdoc}
+     */
     public function open()
     {
-        
+
     }
 
+    /**
+     * {@inheritdoc}
+     */
     public function turnPage()
     {
-        
-    }
 
-}
\ No newline at end of file
+    }
+}
diff --git a/Adapter/EBookInterface.php b/Adapter/EBookInterface.php
index aa16221..c569ab6 100644
--- a/Adapter/EBookInterface.php
+++ b/Adapter/EBookInterface.php
@@ -7,7 +7,6 @@ namespace DesignPatterns\Adapter;
  */
 interface EBookInterface
 {
-
     function pressNext();
 
     function pressStart();
diff --git a/Adapter/Kindle.php b/Adapter/Kindle.php
index c5134c8..72d89e6 100644
--- a/Adapter/Kindle.php
+++ b/Adapter/Kindle.php
@@ -1,27 +1,25 @@
 <?php
 
-/*
- * DesignPatternPHP
- */
-
 namespace DesignPatterns\Adapter;
 
 /**
  * Kindle is a concrete electronic book
- *
- * @author flo
  */
-class Kindle implements ElecBookInterface
+class Kindle implements EBookInterface
 {
-
+    /**
+     * {@inheritdoc}
+     */
     public function pressNext()
     {
-        
+
     }
 
+    /**
+     * {@inheritdoc}
+     */
     public function pressStart()
     {
-        
-    }
 
-}
\ No newline at end of file
+    }
+}
diff --git a/Adapter/PaperBookInterface.php b/Adapter/PaperBookInterface.php
index 282ca09..be748eb 100644
--- a/Adapter/PaperBookInterface.php
+++ b/Adapter/PaperBookInterface.php
@@ -1,9 +1,5 @@
 <?php
 
-/*
- * DesignPatternPHP
- */
-
 namespace DesignPatterns\Adapter;
 
 /**
@@ -11,8 +7,17 @@ namespace DesignPatterns\Adapter;
  */
 interface PaperBookInterface
 {
+    /**
+     * method to turn pages
+     *
+     * @return mixed
+     */
+    public function turnPage();
 
-    function turnPage();
-
-    function open();
-}
\ No newline at end of file
+    /**
+     * method to open the book
+     *
+     * @return mixed
+     */
+    public function open();
+}
diff --git a/Tests/Adapter/AdapterTest.php b/Tests/Adapter/AdapterTest.php
index 9dda0eb..3e72ce7 100644
--- a/Tests/Adapter/AdapterTest.php
+++ b/Tests/Adapter/AdapterTest.php
@@ -6,7 +6,7 @@
 
 namespace DesignPatterns\Tests\Adapter;
 
-use DesignPatterns\Adapter\ElecBookAdapter;
+use DesignPatterns\Adapter\EBookAdapter;
 use DesignPatterns\Adapter\Kindle;
 use DesignPatterns\Adapter\PaperBookInterface;
 use DesignPatterns\Adapter\Book;
@@ -23,13 +23,13 @@ class AdapterTest extends \PHPUnit_Framework_TestCase
         return array(
             array(new Book()),
             // we build a "wrapped" electronic book in the adapter
-            array(new ElecBookAdapter(new Kindle()))
+            array(new EBookAdapter(new Kindle()))
         );
     }
 
     /**
      * This client only knows paper book but surprise, surprise, the second book
-     * is in fact an electronic book.
+     * is in fact an electronic book, but both work the same way
      * 
      * @dataProvider getBook
      */