Generated column and table names in hibernate with underscore

how do I force hibernate to generate db schema such that it converts CamelCase into Underscores (using HBM)? Eg. I have: ``` <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="cz.csas.pdb.be.model.product.passive"> <class name="foo.BarBaz"> <id name="barBazId"> <generator class="sequence"/> </id> <property name="extractContactType"/> <!-- ... --> </class> </hibernate-mapping> ``` And I want hibernate to create table like this (oracle): ``` CREATE TABLE "BAR_BAZ" ( "BAR_BAZ_ID" NUMBER(19,0) NOT NULL ENABLE, "EXTRACT_CONTACT_TYPE" VARCHAR2(512 CHAR), -- PK etc... ) ``` I know I can use table/column name in the hbm.xml file, but I want to set it globally (both to save time and prevent errors).