fix javadoc generation for java 12 / 13

Author: TheSnoozer

core/src/main/java/pl/project13/core/jgit/DescribeCommand.java

@@ -79,6 +79,7 @@ public class DescribeCommand extends GitCommand<DescribeResult> {
    * @param evaluateOnCommit the commit that should be used as reference to generate the properties from
    * @param repo the {@link Repository} this command should interact with
    * @param log logger bridge to direct logs to
+   * @return itself with the options set as specified by the arguments to allow fluent configuration
    */
   @Nonnull
   public static DescribeCommand on(String evaluateOnCommit, Repository repo, LoggerBridge log) {
@@ -91,6 +92,7 @@ public static DescribeCommand on(String evaluateOnCommit, Repository repo, Logge
    * @param evaluateOnCommit the commit that should be used as reference to generate the properties from
    * @param repo the {@link Repository} this command should interact with
    * @param log logger bridge to direct logs to
+   * @return itself with the options set as specified by the arguments to allow fluent configuration
    */
   private DescribeCommand(@Nonnull String evaluateOnCommit, @Nonnull Repository repo, @Nonnull LoggerBridge log) {
     super(repo);

core/src/main/java/pl/project13/core/jgit/JGitCommon.java

@@ -264,7 +264,9 @@ public List<RevCommit> findCommitsUntilSomeTag(Repository repo, RevCommit head,
 
   /**
    * Calculates the distance (number of commits) between the given parent and child commits.
-   *
+   * @param repo the {@link Repository} this command should interact with
+   * @param child the child commit (starting point)
+   * @param parent the parent commit (end point)
    * @return distance (number of commits) between the given commits
    * @see <a href="https://github.com/mdonoughe/jgit-describe/blob/master/src/org/mdonoughe/JGitDescribeTask.java">mdonoughe/jgit-describe/blob/master/src/org/mdonoughe/JGitDescribeTask.java</a>
    */