Added drafts for entity interfaces

src/entity/price/PriceInterface.php

@@ -0,0 +1,31 @@
+<?php
+namespace entity\price;
+
+use entity\currency\CurrencyInterface;
+
+/**
+ *
+ * @author kevinfrantz
+ *        
+ */
+interface PriceInterface
+{
+    /**
+     * Sets the price
+     * @param CurrencyInterface $price
+     */
+    public function setPrice(CurrencyInterface $price):void;
+    
+    /**
+     * Returns the netto price
+     * @return int
+     */
+    public function getNetto():CurrencyInterface;
+    
+    /**
+     * Returns the gross price
+     * @return int
+     */
+    public function getGross():CurrencyInterface;
+}
+