Better param name.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1580746 13f79535-47bb-0310-9956-ffa450edef68
Better param name and do not hide an ivar name.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1580747 13f79535-47bb-0310-9956-ffa450edef68
Add missing javadoc tag.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1580748 13f79535-47bb-0310-9956-ffa450edef68