Javadoc.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/io/trunk@1598278 13f79535-47bb-0310-9956-ffa450edef68
Javadoc.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/io/trunk@1598279 13f79535-47bb-0310-9956-ffa450edef68