Add Javadoc for the implemented methods

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1443585 13f79535-47bb-0310-9956-ffa450edef68
Low hanging fruit

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1443587 13f79535-47bb-0310-9956-ffa450edef68