public void convertProject(File folder) {
        FileSelector fs = new FileSelector(progressListener);
        List<File> fileList = fs.selectJavaFilesInFolder(folder);
        scanFileList(fileList);
        progressListener.onDone();
    }
Ask for concrete matcher implementation depending on the conversion mode
Ask for user confirmation to convert the selected source directory if valid
Ask for user confirmation in case of number of files to convert &gt; 1000

@param conversionType 
@param progressListener
slf4j-migrator/src/main/java/org/slf4j/migrator/ProjectConverter.java