}
/**
- * Create a new compressor channel based a given compression handler
+ * Create a new compressor channel based a given compression handler or NULL if the required PHP functions are not found.
*
- * @return $compressorInstance An instance of this class
+ * @return $compressorInstance An instance of this class or NULL if the required PHP functions are not found.
*/
public static final function createBzip2Compressor () {
// Routines not found by default
/**
* Getter for the file extension of this compressor
*
- * @return $string Returns always "bz2"
+ * @return $string Returns always 'bz2'
*/
public final function getCompressorExtension () {
return 'bz2';