Create a SharePoint WSP that enables the Syncfusion Diagram tool to be used. WSP will have to deploy Syncfusion Java code, DLL’s into the GAC, etc.
Create a default List in SharePoint that will store the Syncfusion HTML code along with the diagram's meta-data.
Enable user to Add a new Diagram (i.e.: Add a new Item) using SharePoint interface, complete the diagram and then save the diagram (the HTML file) back to the SharePoint List.