Is this a good bodybuilding workout plan for gaining muscle mass?

Hi. I'm a 19-year-old male and want to gain muscle mass. Here's my diet and workout:

~Diet:
*Drink 1 gallon of water a day (1 8oz glass an hour) and drink water during workouts
*Eat every 2-3 hours
*Fruits & veggies with every meal
*Protein with every meal
*Carbs & fats with every meal

~Workout:
*4 sets of 6-8 reps on each exercise
*Train abs twice a week
*Train calves and forearms once a week

-Monday: Chest -
*Barbell Flat Bench Press
*Barbell Incline Bench Press
*Barbell Decline Bench Press
*Dumbbell Flys:

-Tuesday: Back & Traps -
*Barbell Deadlift
*Bent-Over Barbell Row
*T-Bar Row
*One-Arm Dumbbell Row
*Chin-Ups
*Barbell Shrugs
*Dumbbell Shrugs

-Wednesday: Legs -
*Barbell Squat
*Leg Press
*Leg Extensions
*Leg Curls

-Thursday: Shoulders -
*Barbell Shoulder Press
*Upright Barbell Row
*Dumbbell Lateral Raises
*Bent-Over Dumbbell Laterals

-Friday: Triceps & Biceps -
*Lying Triceps Extensions
*Seated Dumbbell Triceps Extensions
*Triceps Pressdowns
*Barbell Curls
*Alternate Dumbbell Curls
*Hammer Curls

-Saturday & Sunday: REST