Driver HSQLDB

import java.sql.*;

public class Conexao{

	public static void main(String[] args){
		final String driver = "org.hsqldb.jdbcDriver";
		final String Url = "jdbc:hsqldb:file:~/hsqldb/data/apijava01";
		final String User = "sa";
		final String password = "";
		try{
		
			System.out.println("@@@@@@@@@@@@@@@");
			Class.forName(driver);
			System.out.println("@@@@@@@@@@@@@@@");
			Connection conn = DriverManager.getConnection(Url,User,password);
		}
		catch(SQLException e){
		
			System.out.println("Não");
			
		}
		catch(ClassNotFoundException x){
		
			System.out.println("Seila");
			
		}
		
	}

}