private void visitFile(FileCopyDetails fileDetails) {
            try {
                TarArchiveEntry archiveEntry = new TarArchiveEntry(fileDetails.getRelativePath().getPathString());
                archiveEntry.setModTime(getArchiveTimeFor(fileDetails));
                archiveEntry.setSize(fileDetails.getSize());
                archiveEntry.setMode(UnixStat.FILE_FLAG | fileDetails.getPermissions().toUnixNumeric());