Eclipse Plugin Development : How to add option in Right Click Menu

I have created an eclipse plugin. I am able to add a menu and submenu.

However, I am not able to add an option in the Right Click menu. Does anyone have any idea how to do that?

Here's an example (this code has filled with your preferences and classes and to be added to the plugin.xml):

<extension point="org.eclipse.ui.popupMenus"> 
    <objectContribution
      adaptable="true"
      id=""
      nameFilter=""
      objectClass="org.eclipse.core.resources.IFile">
      <action
         id="org.eclipse.ui.articles.action.contribution.object.action1" 
         label=""
         icon=""
         menubarPath="additions"
         class=""> 
      </action>
    </objectContribution>
</extension>

The provided solution using org.eclipse.ui.popupMenus is deprecated. One should use the org.eclipse.ui.menus extension point.

In general you can configure a menuContribution using the plugin GUI, which will generate the plugin.xml for you. As you requested the menu to be available in the "Right Click menu" you can use popup:org.eclipse.ui.popup.any as locationURI. With additional configuration you can control under which circumstances the menu should be visible.

You can also edit the plugin.xml directly in the plugin.xml tab. The generated plugin.xml will look similar to this:

<extension
    id="menuid"
    point="org.eclipse.ui.menus">
    <menuContribution
        allPopups="false"
        locationURI="popup:org.eclipse.ui.popup.any">
        .
        .
        .
    </menuContribution>
</extension>

See Custom Popup menu in eclipse plugin for a similar problem.