Implement a comparator for sorting names alphabetically

app/src/main/java/ch/nuth/zhaw/exbox/Competitor.java

@@ -24,6 +24,10 @@ public class Competitor implements Comparable<Competitor> {
         return time;
     }
 
+    public Long getTimeValue() {
+        return parseTime(getTime());
+    }
+
     public String getName() {
         return name;
     }
@@ -83,8 +87,13 @@ class AlphaComparatorCompetitor implements Comparator<Competitor> {
 
     @Override
     public int compare(Competitor o1, Competitor o2) {
-        // TODO Implement
-        int c = 0;
-        return c;
+        int result = o1.getName().compareTo(o2.getName());
+
+        if (result == 0) {
+            return Long.compare(o1.getTimeValue(), o2.getTimeValue());
+        }
+        else {
+            return result;
+        }
     }
 }