Erro no Java : No suitable driver found for jdbc:sap:

public static String connectionStringSapQAS = "jdbc:sap://meuservidor:porta";
	public static String user = "usuario";
	public static String password = "senha";

	@Override
	public void start(Task arg0, EntityWrapper wrap, Activity act)
	{
		Connection connection = null;
		try {
			connection = DriverManager.getConnection(connectionStringSapQAS, user, password);
		} catch (SQLException e) {
			System.err.println("Connection Failed. User/Passwd Error? Message: " + e.getMessage());
			return;
		}
		if (connection != null) {
			try {
				System.out.println("Connection to HANA successful!");
				Statement stmt = connection.createStatement();
				ResultSet resultSet = stmt.executeQuery("select 'hello world' from dummy");
				resultSet.next();
				String hello = resultSet.getString(1);
				System.out.println(hello);
			} catch (SQLException e) {
				System.err.println("Query failed!");
			}
		}
	}
}