first version of pattern without Tests

extension-objects/src/main/java/concreteextensions/Commander.java

@@ -0,0 +1,16 @@
+package concreteextensions;
+
+import abstractextensions.CommanderExtension;
+import units.CommanderUnit;
+
+/**
+ * Created by Srdjan on 27-Apr-17.
+ */
+public class Commander implements CommanderExtension {
+
+  private CommanderUnit unit;
+
+  public Commander(CommanderUnit commanderUnit) {
+    this.unit = commanderUnit;
+  }
+}