Application written in Java frontend + backend core DATABASE SYSTEM

That core DATABASE SYSTEM need to be written in Java must connect to all connector database like mysql nosql postgresql oracle mongodb ... contain all of transaction database process : All function for the dashboard ( apps standalone desktop )administrator user have the right to do create backend to users : All function to code in Java are : Function to call to Create new Database Function to call to Drop Database Function to call to Select Database Function to call to Create Table Function to call to Drop Table Function to call to Insert Query Function to call to Select Query Function to call to Update Query Function to call to search in Table or Database Function to call to organize Group by Function to call to Sorting Results Function to print Data if needed. The Front End : The project Java easier to deploy on eclipse framework : The frontend is the Data Store contain : - User Interface ("View") - Model Classes - Controller type of Frontend needed to code are : - Javascript frontend - Mobile frontend - jsp frontend The Backend to load app from server I am looking complete source code for affordable price. Please bid with live demo to finalize it and get paid Asap. Please do not bid with out demos.