Javadoc

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1470340 13f79535-47bb-0310-9956-ffa450edef68
The classes have serial ids; no need to suppress the warning

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1470341 13f79535-47bb-0310-9956-ffa450edef68