First, download the Maven Author Plugin, and then copy this plugin into the directory $MAVEN_HOME/plugins/. Then, use one of the following solution:

Solution 1: Registering it as a Maven report

In your project.xml file add a maven-author-plugin report entry:
Then, when you generate the web site (maven site), Maven will generate the author report which will be available in the web site left menu, under "Project Reports".

Solution 2: Running it manually

In your project, simply execute maven author. This will generate an author xdoc file. Then execute maven xdoc to transform it into an HTML file.