Bug 173039 Exception is shown when accessing a db on an unknown host
Create a report Add a datasource and specified a invalid host name Click on test connection An oversized error dialog appears showing a stack trace Expected: a simple error such as "Host xxx is not accessible" should be displayed instead.
data/org.eclipse.birt.report.data.oda.jdbc/src/org/eclipse/birt/report/data/oda/jdbc/JDBCDriverManager.java
throw new JDBCException( ResourceConstants.CANNOT_LOAD_DRIVER,
							null,
							className );
			}
		}
		Driver driver = null;
		try
		{
			driver = (Driver) driverClass.newInstance( );
		}
		catch ( Exception e )
		{
			logger.log( Level.WARNING, "Failed to create new instance of JDBC driver:" + className, e);
			throw new JDBCException( ResourceConstants.CANNOT_INSTANTIATE_DRIVER, null, className );
		}
		return driver;
	}
	
	/**
	 * Deregister the driver by the given class name from DriverManager
	 * 
	 * @param className
	 * @return true if deregister the driver successfully
	 * @throws OdaException
	 */
	public boolean deregisterDriver( String className ) throws OdaException
	{
		if ( className == null || className.length() == 0)
			
			return false;