Seeing as you are a junior dev the best skill you can start to develop, in my opinion, is the ability to think critically and analyze what you are doing, break it down into smaller pieces, and figure out how to research those issues.
What you are asking is as simple as a google search
A simple search of "blog frameworks for Java EE" resulted in this as the top result
Apache Roller[
^]
Google[
^]
Now if you actually attempt to develop whatever your project may be and run into issues then feel free to come back with a clear explanation of your problem and relevant code samples and I am sure you will find more meaningful help.
In the mean time, evaluate what you are trying to do, break it down into smaller pieces (ex: Creating a blog -> I would start by figuring out how to add data to a database and display it from a database in a web page to start) in order to get past the hump of "where do i start".
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