src/main/java/org/gm4java/engine/support/SimpleGMService.java
@Override
    public String execute(@Nonnull String command, String... arguments) throws GMException, GMServiceException,
            IOException {
        final GMConnection connection = getConnection();
        try {
            return connection.execute(command, arguments);
        } finally {
            connection.close();
        }
    }
@Override
    public String execute(@Nonnull String command, String... arguments) throws GMException, GMServiceException,
            IOException {
        final GMConnection connection = getConnection();
        try {
            return connection.execute(command, arguments);
        } finally {
            connection.close();
        }
    }
{@inheritDoc}