removed Interface-suffix

Structural/Adapter/EBook.php

@@ -0,0 +1,17 @@
+<?php declare(strict_types=1);
+
+namespace DesignPatterns\Structural\Adapter;
+
+interface EBook
+{
+    public function unlock();
+
+    public function pressNext();
+
+    /**
+     * returns current page and total number of pages, like [10, 100] is page 10 of 100
+     *
+     * @return int[]
+     */
+    public function getPage(): array;
+}