code: protected void addClassInfo(ClassDoc cd, Content contentTree) {
          contentTree.addContent(getResource("doclet.in",
                  utils.getTypeName(configuration, cd, false),
                  getPackageLink(cd.containingPackage(),
                      utils.getPackageName(cd.containingPackage()))
                  ));
      }
docs: Add the classkind (class, interface, exception), error of the class
  passed.
  
  @param cd the class being documented
  @param contentTree the content tree to which the class info will be added