diff --git a/src/controller/order/OrderInterface.php b/src/controller/order/OrderInterface.php
new file mode 100644
index 0000000..c94bdc6
--- /dev/null
+++ b/src/controller/order/OrderInterface.php
@@ -0,0 +1,20 @@
+<?php
+namespace controller\order;
+
+/**
+ * @author kevinfrantz
+ *        
+ */
+interface OrderInterface
+{
+    /**
+     * Saves the order
+     */
+    public function store():void;
+    
+    public function addProduct():void;
+    
+    public function showBasket():void;
+    
+    public function selectPaymentMethod():void;
+}
\ No newline at end of file
diff --git a/src/controller/product/ProductInterface.php b/src/controller/product/ProductInterface.php
new file mode 100644
index 0000000..64640a7
--- /dev/null
+++ b/src/controller/product/ProductInterface.php
@@ -0,0 +1,19 @@
+<?php
+namespace controller\product;
+
+/**
+ * @author kevinfrantz
+ *        
+ */
+interface ProductInterface
+{
+    /**
+     * An own Class filter would be better, 
+     * but it's to abstract for this concrete exampl ;)
+     * @param string $color
+     */
+    public function filterByColor(string $color):void;
+    
+    public function showAll():void;
+}
+
diff --git a/src/controller/user/UserInterface.php b/src/controller/user/UserInterface.php
new file mode 100644
index 0000000..da14909
--- /dev/null
+++ b/src/controller/user/UserInterface.php
@@ -0,0 +1,17 @@
+<?php
+namespace controller\user;
+
+/**
+ *
+ * @author kevinfrantz
+ *        
+ */
+interface UserInterface
+{
+    public function login():void;
+    
+    public function logout():void;
+    
+    public function register():void;
+}
+