import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
 
 
public class DictSplitter {
	File dict = new File("diccionario.txt");
	File easy = new File("easy.txt");
	File diff = new File("difficult.txt");
	File noWay = new File("xtreme.txt");
 
	public static void main(String[] args) throws IOException {
		DictSplitter ds = new DictSplitter();
 
		BufferedReader br = new BufferedReader(new FileReader(ds.dict));
		BufferedWriter bwE = new BufferedWriter(new FileWriter(ds.easy));
		bwE.write("Word length: up to 4 letters");
		bwE.newLine();
		BufferedWriter bwD = new BufferedWriter(new FileWriter(ds.diff));
		bwD.write("Word length: 5 to 7 letters");
		bwD.newLine();
		BufferedWriter bwNW = new BufferedWriter(new FileWriter(ds.noWay));
		bwNW.write("Word length: from 8 letters onwards");
		String tmp = "";
		int easyCount = 0, diffCount = 0, nwCount = 0;
 
		while (tmp != null) {
			tmp = br.readLine();
			//        System.out.println("tmp: " + tmp);
			int letters = tmp.length();
			switch (letters) {
			case 0:
			case 1:
			case 2:
			case 3:
			case 4:
				bwE.write(tmp);
				bwE.newLine();
				easyCount++;
				break;
			case 5:
			case 6:
			case 7:
				bwD.write(tmp);
				bwD.newLine();
				diffCount++;
				break;
			default:
				bwNW.write(tmp);
				bwNW.newLine();
				nwCount++;
				break;
			}
		}
		bwE.close();
		bwD.close();
		bwNW.close();
		System.out.println("easy: " + easyCount + "\t\tdifficult: " +
		                   diffCount + "\t\tnoWay: " + nwCount);
	}
}

if(tmp != null)
{
//your code
}

while ((tmp=br.readLine()) != null){