I will now quickly show you how to use transaction BOBF to find all the SAP Business object settings and attributes that you will need to to be able to use any business object either SAP standard or customer created.
Execute transaction BOBF
First execute transaction BOBF and select your SAP business object. Then if you double click on the Business object name it will show you the settings including the 3 made ones you will need such as Root node, Buffer Class and Constants interface.
You can also see settings like lock behaviour, transaction mode, prefix etc.
Node attributes of Business object
More important are the node attributes which include the node name, node type and all the data structures that have been created as part of the business object node. These are the values you will need when writing your ABAP code to make use of the BO functionality.
SAP Business object Combined Structure
As you can see from the image above this is where you need to look to get the name of your main data structure (Persistent structure) and the transient structure. These are the ones created as part of the business object creation process. But there is also a combined structure which is basically a combination of the other structures plus all the basic GUID key fields required by the BO functionality.