Class.forName("org.hsqldb.jdbcDriver");
Connection c = DriverManager.getConnection("jdbc:hsqldb:mem:xmlextref", "sa", "");
initDb(c);
Configuration configuration = new Configuration();
Environment environment = new Environment("development", new JdbcTransactionFactory(), new UnpooledDataSource(
"org.hsqldb.jdbcDriver", "jdbc:hsqldb:mem:xmlextref", null));
configuration.setEnvironment(environment);
configuration.addMapper(ResultMapReferencePersonMapper.class);
configuration.addMapper(ResultMapReferencePetMapper.class);