I am practicing MapReduce with Cloudera turotial [here](https://www.cloudera.com/documentation/other/tutorial/CDH5/topics/ht_wordcount1_source.html). However, currently the tutorial only split words by space with this regex in Java: 

`private static final Pattern WORD_BOUNDARY = Pattern.compile("\\s*\\b\\s*");`

However, in addition to space `"\\s*"`, I also want to define separate words by comma, period(.) and tab(\t), parentheses(), brackets[], and curly braces({}) characters. In other words, I define a word as a string that has one or more alphanumeric characters bounded by two non alphanumeric characters. For example:

* (cece54) has one word "cece54" bounded by `()`
* {dwd] has one word "dwd" bounded by `{]`
* xxx) has one word "xxx" bound by `<space>` and `)`
* so on and so forth.

So how should my regex be written in order to obtain this requirement?