Remove unthrown exceptions. These are not part of the method signature so don't affect binary compatibility

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/net/trunk@1587071 13f79535-47bb-0310-9956-ffa450edef68
Java 8 Javadoc fixes

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/net/trunk@1587072 13f79535-47bb-0310-9956-ffa450edef68