Improve error output and add team id matcher template creator

src/main/java/de/jeyp91/apifootball/APIFootballConnector.java

@@ -121,4 +121,23 @@ public class APIFootballConnector {
 
         return object;
     }
+
+    public JSONObject getTeamsForLeague(int league) {
+        String url = "https://v2.api-football.com/teams/league/" + league;
+        String content = new APIFootballUpdater(0).getRawData(url);
+        return stringToJSONObject(content);
+    }
+
+    private JSONObject stringToJSONObject(String rawData) {
+
+        JSONParser parser = new JSONParser();
+        JSONObject data = null;
+        try {
+            data = (JSONObject) parser.parse(rawData);
+        } catch (Exception e) {
+            /* TODO */
+            e.printStackTrace();
+        }
+        return data;
+    }
 }