How To Add New Sub-hierarchy In XML

I have next xml stucture:
 
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<services>
    <people>
        <name>Julia</name>
        <secondName>Roberts</secondName>
    </people>
</services>

So, I need to add new <people>...</people> stucture. I made next solution:
 
NodeList employees = doc.getElementsByTagName("people");
        Element emp = null;
        for (int i = 0; i < employees.getLength(); i++) {
            emp = (Element) employees.item(i);
            Element people = doc.createElement("people");

[Code] ....

Then I got
 
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<services>
    <people>
        <name>Julia</name>
        <secondName>Roberts</secondName>
    </people>
    <name>Robert</name>
    <secondName>Deniro</secondName>
</services>
 
Yes, I got the new person in my xml file, but it without

<people>...</people>
 
Where I did mistake in my algorithm?