webjars/webjars-locator — pull request #5 by mwanji (2013-01-15 16:37:12+00:00)
Title: Exceptions thrown when no assets found and when more than one asset found

Addresses https://github.com/webjars/webjars-locator/issues/3

I used IllegalArgumentException and a message. Seems helpful enough, without needing to create WebJar-specific exceptions.