private void importData(String dataSetName, String vocabularyName){
		
		//Read documents
		documentNames = new HashMap<String,String>();
		documentOrder = new ArrayList<String>();
		try(BufferedReader br = new BufferedReader(new FileReader("lyricsdata/document_order.txt"))) {
	        String line = br.readLine();
	        while (line != null) {
	        	documentOrder.add(line);
	        	documentNames.put(line, line);
	            line = br.readLine();
	        }
	    } catch(IOException e) {
	    	e.printStackTrace();
	    }
		
		//Read documents names
		
//		try(BufferedReader br = new BufferedReader(new FileReader("lyricsdata/songNames.txt"))) {
//	        String line = br.readLine();
//	        while (line != null) {
//	        	String[] split = line.split(",");
//	        	documentNames.put(split[0], split[1]);
//	            line = br.readLine();
//	        }
//	    } catch(IOException e) {
//	    	e.printStackTrace();
//	    }
		
		//Read vocabulary
		vocabulary = new ArrayList<String>();
		try(BufferedReader br = new BufferedReader(new FileReader("lyricsdata/" + vocabularyName))) {
	        String line = br.readLine();
	        while (line != null) {
	        	vocabulary.add(line);
	            line = br.readLine();
	        }
	    } catch(IOException e) {
	    	e.printStackTrace();
	    }
		
		//Read counts
		wordcount = new ArrayList<List<WordCountTuple>>();
		try(BufferedReader br = new BufferedReader(new FileReader("lyricsdata/" + dataSetName))) {
	        String line = br.readLine();
	        while (line != null) {
	        	ArrayList<WordCountTuple> doc = new ArrayList<WordCountTuple>();
	        	wordcount.add(doc);
	        	String[] wordCounts = line.split(" ");
	        	for(String wc : wordCounts) {
	        		if(!wc.isEmpty()) {
	        			String[] idCnt = wc.split(":");
		        		doc.add(new WordCountTuple(Integer.parseInt(idCnt[0]), Integer.parseInt(idCnt[1])));
	        		}
	        	}
	            line = br.readLine();
	        }
	    } catch(IOException e) {
	    	e.printStackTrace();
	    }
		
	}