Common source code for building apis-main, apis-web, apis-ccc and apis-log.
An example of creating an API specification using the Javadoc command is shown below.
(For Ubuntu18.04)
$ export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64/
$ cd apis-common
$ mvn javadoc:javadoc
The API specification is created in apis-common/target/site/apidocs/.