plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension
         point="org.eclipse.ui.preferencePages">
      <page
            class="org.fortiss.tooling.base.ui.preferences.MainPreferencePage"
            id="org.fortiss.tooling.base.ui.preferences.main"
            name="Fortiss Tooling">
      </page>
      <page
            category="org.fortiss.tooling.base.ui.preferences.main"
            class="org.fortiss.tooling.base.ui.preferences.GraphicalViewerPreferencePage"
            id="org.fortiss.tooling.base.ui.preference.graphical.viewer"
            name="Graphical Viewer">
      </page>
   </extension>

</plugin>