protected function showError( $message, $exitCode = self::EXIT_NO )
	{
		if( is_array( $message ) )
			$message	= join( PHP_EOL, $message );
		$message	= PHP_EOL.$message.PHP_EOL;
		print( $message );
		if( $exitCode != self::EXIT_NO )
			exit( $exitCode );
	}