I have been accused of common ault?

I arrived at a nightclub at around 12:15am with five of my friends to celebrate my 21st birthday. I then made my way to the second floor and started dancing with my friends. I was in the night club for approximately 15 mins when a bouncer tapped me on the shoulder and asked me to follow him and I complied. In the foyer in front of the entrance of the night club he told me I have been kicked out and I asked him why. He refused to give me an answer became aggressive and started to push me. He then repeatedly hit me in the face, I did not retaliate at which point I was saying ‘stop it i’m leaving’ and yet he hit me again and again. When he stopped I left immediately and walked out into the street. I was very upset by the incident and did not understand why he aulted me. Outside I turned to a man employed by the night club to explain to him what happened and showed him my injuries. I was bleeding from the face and had a black eye. The Police arrived around 15 minutes later. I went to talk to one of the police men, again trying to tell them what happened. Suddenly an officer puts handcuffs on me and escorts me into a police van. At the police station they had a look at CCTV and it didn't show anything, apparently just a scuffle in the corner, the other camera was not working. The bouncer has 2 witnesses and I have given 4 witnesses too, since I was with my friends. The police have taken photos of my injuries and I have been released on bail. I am a student and have never been involved with the police before. However I am really worried, because I do not want to get a criminal record. What is the likely outcome?