I suggest we have a code review by some experienced members before releasing the code to devel repo. reviewer can check if the app backs up all the os related files and while uninstalling restores them. A review could be easy as the code wud be open.

best thing wud be some1 create a short script which u pass on in args the file names of os files to be backed up and this script is called while uninstalling too.
I havent done any development on linux but my 2c based on the software development we follow at work.