Narrow catch clause in createArchive() to MavenArchiverException

Instead of catching the broad Exception type, catch only
MavenArchiverException which is the specific checked exception
that createArchive() declares. ArchiverException (from
addDirectory) is a RuntimeException and propagates naturally.

Author: elharo

src/main/java/org/apache/maven/plugins/jar/AbstractJarMojo.java

@@ -288,8 +288,7 @@ public Path createArchive() throws MojoException {
             archiver.createArchive(session, project, archive);
 
             return jarFile;
-        } catch (Exception e) {
-            // TODO: improve error handling
+        } catch (MavenArchiverException e) {
             throw new MojoException("Error assembling JAR", e);
         }
     }