This issue has been fixed within https://issues.jboss.org/browse/JBIDE-12448
See https://issues.jboss.org/browse/JBIDE-12448?focusedCommentId=12716811&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-12716811
Your distribution probably contains an older version of JBoss Tools.
You can check this by openning the Host OSGi Console view:
- Window>Show View>Other...>General>Console
- click the Open Console view action
- select Host OSGi Console
- enter ss project.examples
The following should appear:
org.jboss.tools.project.examples_1.4.0.Beta1-XXX
Try to update JBoss Tools using the http://download.jboss.org/jbosstools/updates/development/juno/ update site.