liquibase-core/src/main/java/liquibase/serializer/core/xml/XMLChangeLogSerializer.java
public Element createNode(String nodeNamespace, String nodeName, String nodeContent) {
        Element element = currentChangeLogFileDOM.createElementNS(nodeNamespace, nodeName);
        element.setTextContent(nodeContent);
        return element;
    }
public Element createNode(String nodeNamespace, String nodeName, String nodeContent) {
        Element element = currentChangeLogFileDOM.createElementNS(nodeNamespace, nodeName);
        element.setTextContent(nodeContent);
        return element;
    }
create a XML node with nodeName and simple text content