Step 1: Make a U Shape
Place 4 Oakwood blocks in a small U-shape (doesn't have to be Oakwood)
Step 2: Flooring
Place a clay and wool block in the centre of the U-shape.
Step 3: Roof
Place four wooden stair blocks on top of the Oakwood blocks
Step 4: Roof 2
Place a single wooden block in the centre of the roof
Step 5: Details
Place 2 wooden fences at the front of the kennel
Step 6: Adding the Wolf
Place a wolf inside your kennel. If in survival tame a wild wolf and make it sit just in front of your kennel, then push it into the kennel.
Step 7: Naming the Wolf
Place a sign on the kennel with the wolfs name on. (This makes having a wolf more fun)