Walkmod is an open source Java tool to apply code conventions. It scans the code and instead of just reporting the invalid source files, it corrects the code automatically http://walkmod.com/index.html
why should you use coding conventions?
40%-80% of the lifetime cost of a piece of software goes to maintenance.
Hardly any software is maintained for its whole life by the original author.
Code conventions improve the readability of the software.
You need to make sure it is as well packaged and clean as any other product you create.