Unfortunately there really isn't. However what you could do is include a "formula" attribute in your class that will combine all the fields into one field then do a like query on it. But well. I would probably not map that because that would mean that combination of all fields would always take place even when you didn't need it. So I would probably write a method to do it with the object once it returns from the query.
The other thing to check out is Hibernate's new search functionality, I forgot what it was called but you can find it at hibernate.org