public void readjustOffsets(ArchiveFile startArchiv)
    {
        ArchiveFile before = null;
        for(ArchiveFile file : archiveFiles)
        {
            if(file.getOffset() > startArchiv.getOffset() && before != null)
            {
                long newOffset = before.getOffset()+before.getLength();
                file.setOffset(newOffset);
            }
            before = file;
        }
    }