There isn't a supported jboss-tools in Juno right now. I ran into the same issue and just downgraded to Indigo and have been moving along just fine.
Thanks, that seems to do the trick.
This stable version of JBoss Tools 4.0.0 works well with Eclipse 4.2 (Juno).
- Add this URL 'http://download.jboss.org/jbosstools/updates/stable/juno/' to site URL's (Help > Install New Software > Add )
- Select the features to install, or click the Select All button.
- Click Next, agree to the license terms, and install.
Note : You can also download JBoss Tools as individual zips for offline installation.
Please take a backup of '~/.eclipse' directory (especially in fedora) before installing the 'Eclipse Juno SR1' UI optimization patch via JBoss Center.