JAX-WS add Username-Token to SOAP-Header

I have a JAX-WS Client generated from WSDL files.
Setting Headers worked so far with following code:

    WSBindingProvider bp = (WSBindingProvider) port;
    bp.setOutboundHeaders(
            Headers.create(new QName("http://schemas.xmlsoap.org/ws/2005/08/addressing", "To", "wsa"), "--To--"),
            Headers.create(new QName("http://schemas.xmlsoap.org/ws/2005/08/addressing", "Action", "wsa"), "--Action--"),
            Headers.create(new QName("http://schemas.xmlsoap.org/ws/2005/08/addressing", "MessageID", "wsa"), UUID.randomUUID().toString())
    );

Which produces (as desired) the following XML snippet:

    <S:Header>
		<To
			xmlns="http://schemas.xmlsoap.org/ws/2005/08/addressing">--to--
		</To>
		<Action
			xmlns="http://schemas.xmlsoap.org/ws/2005/08/addressing">--action--
		</Action>
		<MessageID
			xmlns="http://schemas.xmlsoap.org/ws/2005/08/addressing">fe1b400a-e724-4486-8618-b1d36a0acbbb
		</MessageID>
	</S:Header>

But I need the following chained Tags, which I couldn't acheive with Headers.create(...):

<wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
    <wsse:UsernameToken wsu:Id="PartnerId" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
        <wsse:Username>--username--</wsse:Username>
    </wsse:UsernameToken>
</wsse:Security>

Any ideas how I can add this to the header?

The following code works for me:

        private static final String SCHEMA = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd";
        private static final String SCHEMA_PREFIX = "wsse";
        private static final String USERNAME = "username";
        private static final String PASSWORD = "password";

        // Create a SOAP header
		try {
			SOAPMessage soapMessage = MessageFactory.newInstance().createMessage();
		    SOAPPart soapPart = soapMessage.getSOAPPart();
		    SOAPEnvelope soapEnvelope = soapPart.getEnvelope();

		    SOAPHeader header = soapEnvelope.getHeader();
			// Add the security SOAP header element
		      SOAPHeaderElement security = header.addHeaderElement(new QName(SCHEMA, "Security", SCHEMA_PREFIX));
		      SOAPElement usernameToken = security.addChildElement("UsernameToken", SCHEMA_PREFIX);
		      SOAPElement usernameElement = usernameToken.addChildElement("Username", SCHEMA_PREFIX);
		      SOAPElement passwordElement = usernameToken.addChildElement("Password", SCHEMA_PREFIX);
		      Name typeName = soapEnvelope.createName("type");
		      passwordElement.addAttribute(typeName, "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText");
	
		      usernameElement.setTextContent(USERNAME);
		      passwordElement.setTextContent(PASSWORD);
	
		      ((WSBindingProvider) webServicePort).setOutboundHeaders(Headers.create(security));
		} catch (SOAPException e) {
			logger.severe("Error setting SOAP header");
			e.printStackTrace();
		}

The XML is as follows:

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-html -->

<?xml version="1.0" encoding="utf-8"?>
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
    <env:Header>
        <wsse:Security env:mustUnderstand="1">
            <wsse:UsernameToken>
                <wsse:Username>username</wsse:Username>
                <wsse:Password type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText">password</wsse:Password>
            </wsse:UsernameToken>
        </wsse:Security>
    </env:Header>
    <env:Body>
    ...

<!-- end snippet -->