import java.io.File;
import java.io.FileOutputStream;
import org.apache.poi.xwpf.usermodel.XWPFDocument;

public class CreateDocument {

   public static void main(String[] args)throws Exception  {
   
      //Blank Document
      XWPFDocument document = new XWPFDocument(); 
        
      //Write the Document in file system
      FileOutputStream out = new FileOutputStream( new File("createdocument.docx"));
      document.write(out);
      out.close();
      System.out.println("createdocument.docx written successully");
   }
}

$javac  CreateDocument.java
$java CreateDocument

createdocument.docx written successfully