Solved [!!!] Regenerate/Restore Blocks/Chunks (for an arena)

How would I go about making a plugin that can restore an area after a set amount of time?
For example, if a house is destroyed, it will go back to its previous, unchanged state after x amount of time. I know you could do this by loading a map, but you would have to restart the server, and I don't want to do that. Also, this is not a backup/anti-grief plugin.
Please "tahg" me if you need clarification.

 

Wizehh
Clarification: Have you Google Searched yet?

 

Wizehh
Did you manage to find anything useable, I spent a good deal "google searching" as you were directed to do.. never located anything that really works all that well for what I am looking for.

 

tremor A very remedial (but not ineffective) solution is to turn off auto-saving for the world; then, you can just restart the server.