Section 3. All civil actions brought against a public employer on a claim for damages cognizable under this chapter shall be brought in the county where the claimant resides or in the county where such public employer is situated, except that in the case of the commonwealth such civil actions shall be brought in the county where the claimant resides or in Suffolk county. The superior court shall have jurisdiction of all civil actions brought against a public employer. The district court and housing court shall have jurisdiction of actions brought against housing authorities pursuant to sections twenty-one to twenty-five, inclusive, of chapter two hundred and eighteen.