Add logic for creating competitor lists

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

@@ -1,11 +1,40 @@
 package ch.nuth.zhaw.exbox;
 
+import java.io.BufferedReader;
+import java.io.StringReader;
+import java.util.ArrayList;
 import java.util.List;
 
 public class RankingListServer implements CommandExecutor {
+    /**
+     * The delimiter of the data.
+     */
+    private static final String Delimiter = ";";
 
     public List<Competitor> createList(String rankingText) {
-        // TODO Implement
+        String currentLine;
+
+        try {
+            try (BufferedReader reader = new BufferedReader(new StringReader(rankingText))) {
+                List<Competitor> result = new ArrayList<>();
+
+                while ((currentLine = reader.readLine()) != null) {
+                    String[] fields = currentLine.split(Delimiter);
+
+                    result.add(
+                        new Competitor(
+                            0,
+                            fields[0],
+                            fields[1]));
+                }
+
+                return result;
+            }
+        } catch (Exception e) {
+            System.out.println("An error occurred");
+            System.out.println(e);
+        }
+
         return null;
     }