hibernate/hibernate-orm — pull request #449 by nshestakov (2013-01-19 13:37:36+00:00)
Title: HHH-4084 @UniqueConstraint(columnNames="") causes StringIndexOutOfBoundsException

new version of https://github.com/hibernate/hibernate-orm/pull/447

if column name is empty than throw AnnotationException (likewise column isn't exists).