first version of pattern without Tests

extension-objects/src/main/java/units/Unit.java

@@ -0,0 +1,27 @@
+package units;
+
+import abstractextensions.UnitExtension;
+
+/**
+ * Created by Srdjan on 26-Apr-17.
+ */
+public class Unit {
+
+  private String name;
+
+  public Unit(String name) {
+    this.name = name;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public UnitExtension getUnitExtension(String extensionName) {
+    return null;
+  }
+}