private function getSaveFile()
	{
		$filename = static::getSaveFilename() . static::persistSuffix();
		// When not set.
		if ( empty($filename) )
		{
			throw new InterceptionException( InterceptionException::NO_FILENAME );
		}
		$ext = '.rsd';

		// Build file path.
		return static::getSaveDir() . DIRECTORY_SEPARATOR . $filename . $ext;
	}