Без сортировки результатов, но все работает.

Football.java

import java.io.File;
import java.io.FileInputStream;
import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

/**
 * Created by altairlab on 10.04.2017.
 */
public class Football {
    public static void main(String[] args) {
        File file = new File("matches.txt");
        FileInputStream fin = null;
        try {
            fin = new FileInputStream(file);
        } catch (Exception e) {
            e.printStackTrace();
        }
        Scanner scanner = new Scanner(fin);
        TreeMap<String, Integer> teams = new TreeMap<String, Integer>();
        while (scanner.hasNext()) {
            String matchResult = scanner.nextLine();
            String teamHome = matchResult.split(" ")[0];
            String teamGuest = matchResult.split(" ")[1];
            int resultHome = Integer.parseInt(matchResult
                            .split(" ")[2]
                            .split(":")[0]);
            int resultGuest = Integer.parseInt(matchResult
                            .split(" ")[2]
                            .split(":")[1]);

            teams.put(teamHome, (teams.containsKey(teamHome))
                    ? (getMatchResult(resultHome, resultGuest) + teams.get(teamHome))
                    : getMatchResult(resultHome, resultGuest));
            teams.put(teamGuest, (teams.containsKey(teamGuest))
                    ? (getMatchResult(resultGuest, resultHome) + teams.get(teamGuest))
                    : getMatchResult(resultGuest, resultHome));
        }

        for (Map.Entry<String, Integer> entry : teams.entrySet()) {
            System.out.println(entry.getKey() + " " + entry.getValue());
        }
    }

    public static int getMatchResult(int home, int guest) {
        if (home > guest) return 3;
        else if (home == guest) return 1;
        return 0;
    }
}

Сортировка отображения (Map) по значению

Object[] a = teams.entrySet().toArray();
Arrays.sort(a, new Comparator() {
            public int compare(Object o1, Object o2) {
                return ((Map.Entry<String, Integer>) o2).getValue()
                        .compareTo(((Map.Entry<String, Integer>) o1).getValue());
            }
        });

for (Object e : a) {
    System.out.println(((Map.Entry<String, Integer>) e).getKey() + " : "
            + ((Map.Entry<String, Integer>) e).getValue());
}