explanation after question on presentation

src/main/java/ch/hevs/isi/core/DataPointListener.java

@@ -4,7 +4,7 @@ import java.util.Vector;
 
 public interface DataPointListener {
 
-    // Vector of listeners
+    // Vector of listeners already static and final because it's in an interface
     Vector<DataPointListener> listeners = new Vector<>();
 
     void onNewValue(DataPoint dp);