General
Configuration
Implementation
<javadocDir>${project.reporting.outputDirectory}/../apidocs</javadocDir>
You may want to consider the implementation of PackageSortedSinkReportGenerator and CodeSortedSinkReportGenerator as examples.
The register your report in the exceptioncodes-maven-plugin configuration like this:
Please refer to Using the Report and Plugin documentation (especially Mojo exceptioncodes:report) for further information about configuration of the plugin.