In my country you will get in trouble with the police if you kill or injure a burglar.

It is crazy. You can't legally defend yourself. And if you do, maybe it is best NOT to call a police 

I recently read about a case, where a burglar had come to a house, and slipped on the slippery pathway and injured himself. In that case the owner of the house had to pay the burglar for his injuries.
(There is a law, that requires house owners to keep roads non-slippery)