Problem

After the release of version 2.1, the JDepend Maven Plugin generates reports, but the table layout is broken and not properly rendered. This issue affects projects like Apache Tentacles where the report tables appear malformed, while other table-based reports (like taglist) render correctly.

The root cause is that the plugin was using Doxia 1.x dependencies, which are incompatible with newer Maven site rendering. Doxia 2 requires all tables to have explicit caption elements, and without them, the table layout breaks.

Solution

This PR migrates the plugin to Doxia 2 by:

1. Upgrading Maven Reporting Dependencies

   • maven-reporting-api: 3.1.1 → 4.0.0
   • maven-reporting-impl: 3.2.0 → 4.0.0
   • Added maven-core dependency (version 3.6.3) required by Doxia 2

2. Adding Table Captions

   • Added tableCaption() elements to all 5 tables in ReportGenerator.java:
     • Summary table
     • Packages detail tables (2 tables)
     • Cycles table
     • Explanation table

Changes

The changes are minimal and surgical, following the same migration pattern used in taglist-maven-plugin#160:

pom.xml: Updated dependencies to Doxia 2 versions

ReportGenerator.java: Added table captions after each sink.table() call:

sink.table();
sink.tableCaption();
sink.text(bundle.getString("report.summary.title"));
sink.tableCaption_();

Verification

• ✅ All 7 existing tests pass
• ✅ Build succeeds with only deprecation warnings (for Renderer and getOutputName())
• ✅ Generated HTML reports now contain proper <caption> elements in all tables
• ✅ Test project verified - tables render correctly with proper layout

Related Issues

Fixes #44

Similar to mojohaus/taglist-maven-plugin#160 (Doxia 2 migration)

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