Description: setting source version for maven-javadoc-plugin to avoid
 "The code being documented uses modules but the packages defined in ... are
 in the unnamed module" exception.
Author: Andrius Merkys <merkys@debian.org>
--- a/opennlp-tools/pom.xml
+++ b/opennlp-tools/pom.xml
@@ -110,6 +110,7 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
           <excludePackageNames>opennlp.tools.cmdline</excludePackageNames>
+          <source>${java.version}</source>
         </configuration>
         <executions>
           <execution>