Implement developer classes and criteria for product filtering

src/main/java/net/itsthesky/projetbut2/dip/FrontEndDeveloper.java

@@ -0,0 +1,9 @@
+package net.itsthesky.projetbut2.dip;
+
+public class FrontEndDeveloper  implements Developer{
+    @Override
+    public void develop() {
+        IO.println("I write Javascript code !");
+    }
+
+}