how to configure explore to add customized tag to default whitelist

[qsdmv]

I would like to add customized tag to default whitelist so that customized tag not stripped by EditOnlineDialog (StringUtils.stripUnsafeHTMLTags(reader.getContentString(), false))

How do we just configure StringUtils to add customized tags to the whitelist without touching jar file?

Thanks in advance

[qsdmv]

Never mind. I already resolved it.
Thanks

[muralidharand]

If you provide the approach here, it might help someone in the feature.