The code is fine, it handles the comments (which is why I always advocate that you don’t write the comments). How to do?Add a parameter:
Option 1 (invalid) :

mvn \
    -Xdoclint:none

Complains.
Method 2 (effective) :
Search for maven-javadoc-plugin in pom.xml and change it to something like this:
After 3.0.0:

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-javadoc-plugin</artifactId>
    <configuration>
      <doclint>none</doclint>
    </configuration>
  </plugin>

3.0.0 before:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-javadoc-plugin</artifactId>
    <configuration>
      <additionalparam>-Xdoclint:none</additionalparam>
    </configuration>
  </plugin>