Example apps for Tomcat and JBoss

I would personally encourage you to try tomEE+ and they have examples for you to try out as well. 

You can also see tomcat supported versions and tomEE supported versions for the JEE environment.

If you are thinking JBoss Wildfly, take a look at the Ticket Monster example app by JBoss.

Git Branching and Merging

New Branch
-----------
To create a new branch
$ git checkout -b BRANCH-NAME

This is same as
$ git branch BRANCH-NAME
$ git checkout BRANCH-NAME

 
New Tag
-------
Create a new tag. This will create one locally
$ git tag -a TAG-NAME -m "commit message"

Push the new created tag to remote
$ git push --follow-tags

To view git tag message
$ git tag --list

Merge Branches
-------------- 
Note: When merging, it's the local copies that get merged. So make sure you have the latest copies locally for both branches.
To merge your branch to master
Switched to branch 'master'
$ git checkout master
$ git pull

Assuming you have the latest in your branch.
$ git merge BRANCH-NAME


If there are any merge conflicts, then you have to resolve them first before you push the merge. So after resolving any conflicts, just push the merge
$ git commit origin master
$ git push origin master