plugins/languages/cpp/org.eclipse.papyrus.designer.languages.cpp.cdt.project/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.2"?>
<plugin>
   <extension
         point="org.eclipse.papyrus.designer.languages.common.extensionpoints.languageProjectSupport">
      <client
            class="org.eclipse.papyrus.designer.languages.cpp.cdt.project.CppProjectSupport"
            language="C++">
      </client>
   </extension>
   <extension
         point="org.eclipse.papyrus.designer.languages.common.extensionpoints.languageProjectSupport">
      <client
            class="org.eclipse.papyrus.designer.languages.cpp.cdt.project.CProjectSupport"
            language="C">
      </client>
   </extension>
 </plugin>