Somewhere during Hibernate 3, Javadoc JARs stopped being uploaded to Maven central.

To date, Hibernate 4.3.8 does not have official Javadocs on the central repository, where documentation browsing tools and IDEs seach for them.

Search for Hibernate 4.3.8 on Maven central and notice the missing "javadoc.jar" links on the right.

Compare with any other well-knows Java library, eg. Spring 4.1.5