Comment by philippe.beaudoin:In Eclipse Indigo Java IDE I was not able to install build-helper-maven-plugin from the update site you recommend here (I got a missing dependency error). Instead I installed `build helper` from `Window
Preferences > Maven > Discovery > open catalog`.
For more information: http://code.google.com/p/google-web-toolkit/wiki/WorkingWithMaven -- http://groups.google.com/group/Google-Web-Toolkit-Contributors