Door stopper with a wall mount

Main entrance door to my apartment didn't have a spacer and the door was hitting the radiator when opening. I've therefore designed a simple, two piece model of a door stopper, which can mount to the wall.

The base piece can be screwed into a plug placed in the wall and then the spacer can be placed on top with a tight enough fit so it does not slide. The spacer length can be adjusted to your needs.