Help needed for eclipse plugin development

Hello All,
I am trying to develop a plugin for eclipse where the major requirement is to have a UI and as the user go on clicking the UI element (Like text box, checkbox ) , in the background a file will get written . I am completely unaware of eclipse plugin development. Can anybody please give me some starting pointer to achieve the this ? Any white paper, link will greatly be appreciated.
Thanks in advance
Samir

http://www.eclipse.org/articles/Article-Your%20First%20Plug-in/YourFirstPlugin.html

Thanks Manisha,
But the link which you send does not have the example which I am talking about. Can you please give me some pointer to the example which actually write into the file on every user click
Thanks
Samir

Thanks Manisha,

Who is Manisha? Last time I checked I was a male.

So you want ready made code which you can adapt with minor changes?

I am sorry Maneesh ..its a typo.
Well..I don't want ready made code for the same . I just need some guidelines to start with
Thanks
Samir