Never commit files with warnings to SVN. Simple recommendation a lot of people don't follow. Well, you can either do it manually or you can try this simple plug-in that will check files you are about to commit for warnings
Clips Eclipse (3.2 and above) plug-in
This plug-in supports cut/copy/paste and management of multiple snippets of text.
* Commands
* Copy text selected in text editor as a clip `Alt+Shift+X Alt+Shift+C`
* Cut text selected in text editor as a clip `Alt+Shift+X Alt+Shift+X`
* Copy Clipboard text content as a clip `Alt+Shift+X Alt+Shift+B`
* Paste clip in active text editor `Alt+Shift+X Alt+Shift+V`. The pasted text is left selected. If this command is invoked again within ~1 sec the successive clips are pasted.
* Rotate Clips Up `Alt+Shift+X Alt+Shift+9`
* Rotate Clips Down `Alt+Shift+X Alt+Shift+0`
* Swap top two clips `Alt+Shift+X Alt+Shift+6`
* Clips View
* Clips View Actions
* Paste first selected clip in the active text editor
* Remove selected clips
* Remove All clips
* Rotate Clips Up
* Rotate Clips Down
* Swap top two clips
* Clips preferences page
* Automatically create clips after Cut or Copy commands
* Number of clips to store
Update Site
http://clipseclipseplugin.googlecode.com/svn/trunk/ClipsUpdateSite/