EXECUTE: Download and launch sample HSQL database(attached).
EXECUTE: Create Seam 2.2 war project. In connection profile set target db - this sample db(hsql://localhost:1701).
EXECUTE: Expand database node in Hibernate Configurations view.
FAILURE: Exception thrown about "naming strategy".
EXECUTE: Select this Seam project > New > Generate Entities > Reverse.
FAILURE: Exception thrown about "naming strategy". Error log attached.

Updated:
Problem with hsqldb.jar from example database (from our guides). Replacing jar with new one solve problem.

http://download.jboss.org/jbosstools/nightly-docs/en/GettingStartedGuide/html/first_seam.html#create_seam_application

3.1.1. Start Development Database
http://anonsvn.jboss.org/repos/jbosstools/trunk/documentation/guides/GettingStartedGuide/en/database.zip

This example has old version of hsqldb.jar. Please, update this example.