JavaDoc fails to build under Java 11

[vorburger]

    1 error                                                                                                    
    4 warnings                                                                                                 
    [INFO] ------------------------------------------------------------------------
    [INFO] BUILD FAILURE
    [INFO] ------------------------------------------------------------------------
    [INFO] Total time:  12.764 s
    [INFO] Finished at: 2020-06-07T01:35:04+02:00
    [INFO] ------------------------------------------------------------------------
    [ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.0.1:jar (attach-javadocs) on project xtendbeans: MavenReportException: Error while generating Javadoc: 
    [ERROR] Exit code: 1 - javadoc: error - The code being documented uses modules but the packages defined in https://docs.oracle.com/javase/8/docs/api/ are in the unnamed module.
    [ERROR] /home/vorburger/dev/xtendbeans/ch.vorburger.xtendbeans/target/generated-sources/xtend/main/ch/vorburger/xtendbeans/XtendBeanGenerator.java:614: warning: no @param for constructors
    [ERROR]   protected Optional<Constructor<?>> chooseUnionConstructor(final Constructor<?>[] constructors, final Map<String, XtendBeanGenerator.Property> propertiesByName, final Multimap<Class<?>, XtendBeanGenerator.Property> propertiesByType) {
    [ERROR]                                      ^
    [ERROR] /home/vorburger/dev/xtendbeans/ch.vorburger.xtendbeans/target/generated-sources/xtend/main/ch/vorburger/xtendbeans/XtendBeanGenerator.java:614: warning: no @param for propertiesByName
    [ERROR]   protected Optional<Constructor<?>> chooseUnionConstructor(final Constructor<?>[] constructors, final Map<String, XtendBeanGenerator.Property> propertiesByName, final Multimap<Class<?>, XtendBeanGenerator.Property> propertiesByType) {
    [ERROR]                                      ^
    [ERROR] /home/vorburger/dev/xtendbeans/ch.vorburger.xtendbeans/target/generated-sources/xtend/main/ch/vorburger/xtendbeans/XtendBeanGenerator.java:614: warning: no @param for propertiesByType
    [ERROR]   protected Optional<Constructor<?>> chooseUnionConstructor(final Constructor<?>[] constructors, final Map<String, XtendBeanGenerator.Property> propertiesByName, final Multimap<Class<?>, XtendBeanGenerator.Property> propertiesByType) {
    [ERROR]                                      ^
    [ERROR] /home/vorburger/dev/xtendbeans/ch.vorburger.xtendbeans/target/generated-sources/xtend/main/ch/vorburger/xtendbeans/XtendBeanGenerator.java:614: warning: no @return
    [ERROR]   protected Optional<Constructor<?>> chooseUnionConstructor(final Constructor<?>[] constructors, final Map<String, XtendBeanGenerator.Property> propertiesByName, final Multimap<Class<?>, XtendBeanGenerator.Property> propertiesByType) {
    [ERROR]                                      ^
    [ERROR] 
    [ERROR] Command line was: /usr/lib/jvm/java-11-openjdk-11.0.7.10-0.fc32.x86_64/bin/javadoc @options @packages
    [ERROR] 
    [ERROR] Refer to the generated Javadoc files in '/home/vorburger/dev/xtendbeans/ch.vorburger.xtendbeans/target/apidocs' dir.

@rovarga I don't suppose you have any interest to fix that?

[rovarga]

@vorburger I have seen this before, but not seeing it in ODL anymore -- perhaps javadoc-plugin upgrade to 3.1.1+?