Just copy these jars in the eclipse plugin Folder
1 com.vaadin.integration.eclipse.jar
2 com.vaadin.manual.jar
3 com.vaadin.wysiwyg.eclipse.jar
copy these folders in the feature folder of eclipse
1.com.vaadin.integration.eclipse.manual
2.com.vaadin.integration.eclipse
3 com.vaadin.wysiwyg.eclipse
and last but not least add this file in the Configuration folder
com.vaadin.integration.eclipse
Enjoy the game …