Create the classe RockyFactory

src/main/java/model/Rocky.java

+package model;
+
+import util.Position;
+
+public class Rocky extends BoardElement{
+    private final int fireDelay=4;
+    public Rocky(Position position) {
+        super(position);
+    }
+
+    @Override
+    public String getType() {
+        return null;
+    }
+
+    @Override
+    public String toString() {
+        return null;
+    }
+}

src/main/java/model/RockyFactory.java

+package model;
+
+public class RockyFactory {
+}