7a8,9
> import CH.ifa.draw.framework.DrawingView;
> 
24,33c26
< public abstract class Command {
< 
<     private String  fName;
< 
<     /**
<      * Constructs a command with the given name.
<      */
<     public Command(String name) {
<         fName = name;
<     }
---
> public interface Command {
38c31
<     public abstract void execute();
---
>     public void execute();
43,45c36
<     public boolean isExecutable() {
<         return true;
<     }
---
>     public boolean isExecutable();
50,52c41,43
<     public String name() {
<         return fName;
<     }
---
>     public String name();
>     
>     public DrawingView view();