This Eclipse plugin (developped on Eclipse 3.7.1) is for Maven users who want to mark the target folders as derived resources.
The point is to hide the derived resources when searching for resources (with i.e. Ctrl+Shift+R). After a mvn clean, the target
folders are recreated, and the plugin will help to mark these new folders as derivated.

To install the plugin, copy the latest jar-file under plugins/ to your Eclipse plugins/ folder. Restart Eclipse.