Bug 123042 When do some operation on the data drive manager, the eclipse may be broken.
Description: When do some operation on the data drive manager, the eclipse may be broken. Steps to reproduce: 1. new a JDBC data resource, and click the "Manage drivers" 2. delete a Jar file , and click "OK" 3. click the "Manage drivers" , add the deleted Jar File and click "OK" 4. click the "Manage drivers" and click the 'Drivers' tab, and set a 'Display name' and 'URL Template' and clcik 'OK' 5. click the "Manage drivers" and click the 'Drivers' tab, and delete the 'Display name' and 'URL Template' and clcik 'OK' Actual result: The eclipse is broken. Expect result: The eclipse runs in good shape.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/util/JdbcToolKit.java
}
		return aClass;
	}
	/**
	 * Check whether the given class implemented <tt>java.sql.Driver</tt> 
	 * @param aClass the class to be checked
	 * @return <tt>true</tt> if <tt>aClass</tt> implemented
	 *         <tt>java.sql.Driver</tt>,else <tt>false</tt>;
	 */
	private static boolean isImplementedDriver( Class aClass )
	{
		return aClass != null && implementsSQLDriverClass( aClass ) &&
				! Modifier.isAbstract( aClass.getModifiers( ));
	}
	
	/**
	 * Get all resouces included in a jar file
	 * @param jarFile
	 * @return
	 */
	private static String[] getAllResouceNames( File jarFile )
	{
		ArrayList jarEntries = new ArrayList( );
		try
		{
			ZipFile zf = new ZipFile( jarFile );
			Enumeration e = zf.entries( );
			while ( e.hasMoreElements( ) )
			{
				ZipEntry ze = (ZipEntry) e.nextElement( );