#1113 Link uml-reverse-mapper created class diagrams to readme, where needed

dependency-injection/README.md

@@ -17,6 +17,7 @@ pattern separates the creation of a client's dependencies from its own
 behavior, which allows program designs to be loosely coupled and to follow the
 inversion of control and single responsibility principles.
 
+## Class diagram
 ![alt text](./etc/dependency-injection.png "Dependency Injection")
 
 ## Applicability