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As long as the HELOC remains current, there shouldn't be any problems. What will likely happen is that your credit report will look normal, and your husband's will report a $0 balance and notes "included in bankruptcy."
I am assuming you are not in one of the nine community property states (Arizona,California, Idaho, Louisiana, Nevada, New Mexico,Texas, Washington and Wisconsin) or Alaska. If you ARE in one of these states, you'll want to carefully discuss your options with an attorney, as you may be liable to debt that was obtained during marriage that your husband discharges through bankruptcy.
His BK should NOT affect your credit.
You will still be responsible for anything you are responsible for now.
As a matter of fact, some states protect items owned jointly even if one files as long as both dont.
DON'T WORK FOR CREDIT CARDS ... MAKE CREDIT CARDS WORK FOR YOU!