refactored Decorator pattern

Structural/Decorator/BookingDecorator.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace DesignPatterns\Structural\Decorator;
+
+abstract class BookingDecorator implements Booking
+{
+    /**
+     * @var Booking
+     */
+    protected $booking;
+
+    public function __construct(Booking $booking)
+    {
+        $this->booking = $booking;
+    }
+}