diff --git a/Structural/Bridge/Vehicle.php b/Structural/Bridge/Vehicle.php
index f519d70..80311e1 100644
--- a/Structural/Bridge/Vehicle.php
+++ b/Structural/Bridge/Vehicle.php
@@ -16,7 +16,5 @@ abstract class Vehicle
         $this->workShop2 = $workShop2;
     }
 
-    public function manufacture()
-    {
-    }
+    abstract public function manufacture();
 }