question: public OptionalPartsConf ( String confDir ) throws IOException { File optionalPartsDir = new File ( confDir ) ; final String optionalPartsPath = optionalPartsDir . getAbsolutePath ( ) ; if ( ! optionalPartsDir . isDirectory ( ) ) { log . warn ( "Optional configuration parts directory '{}' " + "either does not exist or is regular file" , optionalPartsPath ) ; return ; } log . debug ( "Getting optional conf parts from directory '{}'" , confDir ) ; File [ ] optionalPartFiles = optionalPartsDir . listFiles ( getIniFileFilter ( ) ) ; if ( optionalPartFiles == null ) { log . warn ( "Optional part files list in directory '{}' " + "cannot be fetched." , optionalPartsPath ) ; return ; } List < File > files = Arrays . asList ( optionalPartFiles ) ; files . forEach ( null ) ; }
target:  Creates optional parts configuration.