WTP : http://www.eclipse.org/webtools/
XDoclet . http://xdoclet.sourceforge.net/xdoclet/index.html
To use XDoclet annotation support, or to create enterprise beans, XDoclet must be installed on your system and configured to work with the workbench.
Download and install XDoclet from http://xdoclet.sourceforge.net/xdoclet/index.html
To configure XDoclet to work with the workbench:
1.Click Window > Preferences > XDoclet to open the XDoclet Runtime Preferences page.
2.Check the Enable XDoclet Builder check box to turn on annotation-based artifact creation.
3.Use the Browse button to locate the installation directory for XDoclet (XDoclet Home).
4.Select the Version of XDoclet that you have installed. Supported versions include 1.2.1, 1.2.2, 1.2.3.
5.Click OK to save the preferences.