[Eap-features] introduce variable : encourage use of interface

[Alain Ravet]

When using "Introduce Variable" on  

    .

    new ArrayList ();

 

you get

 

   ArrayList arrayList = new ArrayList ();

 

 

Most of the time, though, you should use

   .

   List arrayList = new ArrayList ();

 

 

 

"Introduce Variable" should allow the user to choose it's target type.

 

   

Alain Ravet