plugins/org.eclipse.jst.common.ui/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>

    <extension
          point="org.eclipse.wst.common.modulecore.ui.referenceWizardFragment">
       <referenceFragment
             class="org.eclipse.jst.common.ui.assembly.wizard.JarReferenceWizardFragment"
             icon="icons/jar_obj.gif"
             id="org.eclipse.jst.common.ui.jarReference"
             name="Jar">
       </referenceFragment>
       <referenceFragment
             class="org.eclipse.jst.common.ui.assembly.wizard.ExternalJarReferenceWizardFragment"
             icon="icons/jar_obj.gif"
             id="org.eclipse.jst.common.ui.externalJarReference"
             name="External Jar">
       </referenceFragment>
       <referenceFragment
             class="org.eclipse.jst.common.ui.assembly.wizard.VariableReferenceWizardFragment"
             icon="icons/jar_obj.gif"
             id="org.eclipse.jst.common.ui.variableReference"
             name="Variable">
       </referenceFragment>
    </extension>

</plugin>