Eclipse EMF , save , create xml from zip file

I have a zip file which contains xml file into it . I have loaded this xml through EMF , I have one more xml file in a extracted folder . i have loaded this xml too through EMF .

Now , my requirement is to add the one element from extracted xml to zip xml and save 
the xml file of zip file again to that zip file , 
Could anyone help me ?


More Details : 

xml_1 location -> d://xml_folder/abc.zip

abc.zip contains xml_1.xml

xml_2 location -> d"//any_folder/xml_2.xml

Both xml_1 and xml_2 are of same type , ie is similar.

xml_1

<root>
<students>
<student>
<name>anuj</name>
</student>
</students>
</root>


xml_2

<root>
<students>
<student>
<name>john</name>
</student>
</students>
</root>


I want output as :

xml_1.xml look like this and it should be in same zip location

<root>
<students>
<student>
<name>anuj</name>
</student>
<student>
<name>john</name>
</student>
</students>
</root>

Could anyonne helop me inn doing this ?