Most of the worldwide telecommunications laws and regulations require that websites that are not used strictly for private or personal use must have an imprint that complies with the law. This includes websites that contain a blog or texts of a journalistic nature.
The name of the contact person responsible for the content must be mentioned in the imprint, along with an address and a means of reaching this person. Your imprint may also require other legally required information. Consult an expert to find out what specific information is needed for your site.