// Create the data source and initialize the database tables
Driver hsqlDriver = (Driver) Class.forName("org.hsqldb.jdbcDriver").newInstance();
Properties info = new Properties();
info.put("shutdown", true);
Connection conn = hsqlDriver.connect("jdbc:hsqldb:mem:sqltest", info);
// Connection conn = DriverManager.getConnection("jdbc:hsqldb:mem:sqltest");
conn.createStatement().execute("CREATE TABLE users (user VARCHAR(255), password VARCHAR(255))");
conn.createStatement().execute("CREATE TABLE groups (grp VARCHAR(255), user VARCHAR(255))");
// Add users