According to this article http://blog.joda.org/2014/02/turning-off-doclint-in-jdk-8-javadoc.html we can simply switch off validation temporarily with
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<configuration>
<additionalparam>-Xdoclint:none</additionalparam>
</configuration>
</plugin>
</plugins>
That said we should still create issues in JIRA for all mentioned errors and fix them to eventually turn it back on.