Design class diagram generate to ERD and generate Hibernate ORM code.
Visual Paradigm for UML (VP-UML) is an ALL-IN-ONE Visual Development Platform. VP-UML supports the full development life cycle, the latest UML notation for visual modeling and code generation. VP-UML is integrated with the Eclipse IDE for coding and round-trip code engineering. Software developers can perform Model-Code-Deploy effectively and efficiently within one unique visual development platforFeature List:
+Support UML version 2.1
+Business Workflow diagram
+Mind Mapping Diagram (New Feature)
+Requirement Modeling (Enhanced)
+Callout and Freehand shape (New Feature)
+Nicknamer - Create translated copies of model (New Feature)
+Model Transitor (New Feature)
+User Interface Designer
+Java Roundtrip engineering
+Reverse engineering Java, C++, XML Schema, XML, .NET exe/dll, CORBA IDL, XML Schema and Python
+Code Generation - model to code, diagram to code
+Use Case Details Editor - An all-in-one environment for specifying a use cases details including general model specification and use case descriptions
+EJB Diagram - Visualize EJB systems
+EJB Code Generation
+Data flow diagram
+ORM support - generate Java objects from database
+Database generation - ERD to database tables
+Database reverse - existing DBMS to ERD (Enhanced)
+Modeling collaboratively with VP Teamwork Server, CVS, Subversion and Perforce (New Feature)
+Report generator for generating documentation (Enhanced)
+Automatic diagram layout
+Import/export XMI file
+Support Stored Procedure and Database Trigger
+Export Diagrams to JPG, PNG, SVG, EMF, PDF
+Shape editor
+More...

Other UML modeling Tools/UML Plugins:
Java Platform (Windows/Linux/Mac OS X):
+SDE for Eclipse
+SDE for NetBeans
+SDE for Sun ONE
+SDE for Oracle JDeveloper
+SDE for JBuilder
+SDE for IntelliJ IDEA
+SDE for WebLogic Workshopm. Download and try it out now! you can free download Visual Paradigm for UML (PE) [Windows] 8.0 now.