Added Specification pattern

Specification/Item.php

@@ -0,0 +1,31 @@
+<?php
+namespace DesignPatterns\Specification;
+
+/**
+ * An trivial item
+ */
+class Item
+{
+    protected $price;
+
+    /**
+     * An item must have a price
+     * 
+     * @param int $price
+
+     */
+    public function __construct($price)
+    {
+        $this->price = $price;
+    }
+
+    /**
+     * Get the items price
+     * 
+     * @return int
+     */
+    public function getPrice()
+    {
+        return $this->price;
+    }
+}