A DESCRIPTION OF THE PROBLEM :
At the beginning of the class-level Javadoc, it says: "a XML representation" and a bit further "a XML repsentation".

I believe it should be "an XML representation" twice.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Some Java types do not map naturally to an XML representation, for example HashMap or other non JavaBean classes. Conversely, an XML representation
ACTUAL -
Some Java types do not map naturally to a XML representation, for example HashMap or other non JavaBean classes. Conversely, a XML repsentation

URL OF FAULTY DOCUMENTATION :
http://docs.oracle.com/javase/8/docs/api/javax/xml/bind/annotation/adapters/XmlAdapter.html