private void writeLevels()
    {
        Element root;

        try
        {
            for(Map.Entry<File, Document> map : docs.entrySet())
            {
                root = map.getValue().getRootElement();

                for(Element item : root.elements("skill"))
                {
                    HashMap<Integer, ArrayList<Integer>> map_for_cur_id = parsedData.get(Integer.parseInt(item.attributeValue("id")));
                    if(map_for_cur_id == null)
                        continue;

                    Element abn_level_param = item.addElement("table name=\"#abnormal_levels\"");

                    for(ArrayList<Integer> list : map_for_cur_id.values())
                    {
                        String str = list.toString();
                        str = str.replace("[", " ");
                        str = str.replace("]", " ");
                        abn_level_param.addText(str);
                    }
                }

                OutputFormat format = OutputFormat.createPrettyPrint();

                format.setEncoding("UTF-8");
                format.setIndent("\t");
                format.setLineSeparator("\r\n");

                XMLWriter writer = new XMLWriter(new OutputStreamWriter(new FileOutputStream(map.getKey()), "UTF8"), format);
                writer.write(map.getValue());
                writer.close();
            }

        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }