I can not reproduce this behaviour purposely, it 
just happens from time to time.

1) create new file from the package context menu: 
RMC on package > New > Java Class
2) Enter the file name and press "finish"

After that IDE may hang - it will not respond to 
any command (except to minimise and maximise) and 
it will not redraw its window so it will be 
uniform gray if some other window will overlap 
it. Actualy it will start from not redrawing the 
part of its window that was obscured by the "New 
Wizard - Java Class" dialog.

The only way to do something to it is to end the 
process from the task manager.

But the file with the specified name is created 
and all macroses inside it are resolved to 
appropriate strings except the name of the 
constructor that remains the same as it was in 
the template.