added Resources calss to access teh properties

Projekte/mdga/model/src/main/java/pp/mdga/Resources.java

@@ -0,0 +1,33 @@
+package pp.mdga;
+
+import java.util.ResourceBundle;
+
+/**
+ * Provides access to the resource bundle of the game.
+ *
+ * @see #BUNDLE
+ */
+public class Resources {
+    /**
+     * The resource bundle for the MDGA game.
+     */
+    public static final ResourceBundle BUNDLE = ResourceBundle.getBundle("mdga"); //NON-NLS
+
+    /**
+     * Gets a string for the given key from the resource bundle in {@linkplain #BUNDLE}.
+     *
+     * @param key the key for the desired string
+     * @return the string for the given key
+     * @throws NullPointerException               if {@code key} is {@code null}
+     * @throws java.util.MissingResourceException if no object for the given key can be found
+     * @throws ClassCastException                 if the object found for the given key is not a string
+     */
+    public static String lookup(String key) {
+        return BUNDLE.getString(key);
+    }
+
+    /**
+     * Private constructor to prevent instantiation.
+     */
+    private Resources() { /* do not instantiate */ }
+}