When scrolling to the bottom of the following page, links are provided to the javadocs of the major maven APIs:
http://maven.apache.org/guides/index.html
All the links to these javadocs are currently broken.
Following the links to http://maven.apache.org/ref/current/
, none of the documentation sites include the maven reports section, which I suspect is the reason for the javadocs being missing.
Thanks for reporting it!