question: public static void writeFile ( byte [ ] fileData , File file ) throws OpenStegoException { OutputStream os = null ; try { if ( file == null ) { os = System . out ; } else { os = new FileOutputStream ( file ) ; } os . write ( fileData ) ; os . close ( ) ; } catch ( IOException ioEx ) { throw new OpenStegoException ( ioEx ) ; } }
target:  Method to write file data to disk