In Eclipse:
 1:  Create a new Java project; I called mine BST2016; the name is unimportant
     Don't worry about customizing settings at this point
Outside Eclipse:
 2:  Create a directory structure BST2016/src/Minor/P2/DS/
 3:  Copy testHarness.java into src/
 4:  Copy BST.java into src/Minor/P2/DS/
 5:  Create a new directory BST2016/addin/
 6:  Copy Monk.class into BST2016/addin/
 7:  Create a directory structure BST2016/addin/Minor/P2/DS/
 8:  Copy Monk.class into BST2016/addin/Minor/P2/DS/
     (No, I don't see why I need both copies of Monk.class)
Back in Eclipse:
 9:  Right-click on the project BST2016; goto Properties
10:  Select Java Build Path; goto the Libraries tab
11:  Click on Add a Class Folder
12:  Select the BST2016/addin directory
13:  Click OK
14:  Go to Build and select Clean
15:  Then select Build Project

Note:  the build will fail unless you've cleaned up the posted BST.java file
       and implemented the methods enough to compile them