docx4j Insert Page Break

The version used is:

<dependency>
    <groupId>org.docx4j</groupId>
    <artifactId>docx4j</artifactId>
    <version>6.1.2</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jaxb</groupId>
    <artifactId>jaxb-runtime</artifactId>
    <version>2.3.1</version>
</dependency>

Code:

import org.docx4j.openpackaging.exceptions.Docx4JException;
import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
import org.docx4j.wml.*;

private static void addPageBreak(WordprocessingMLPackage wordMLPackage) {
    // Create page break element
    Br pageBreak = new Br();
    pageBreak.setType(STBrType.PAGE);

    // Create paragraph and run elements, and add page break to run element
    P paragraph = new P();
    R run = new R();
    run.getContent().add(pageBreak);

    // Add run element to paragraph
    paragraph.getContent().add(run);

    // Add paragraph to end of document
    wordMLPackage.getMainDocumentPart().getContent().add(paragraph);
}