The ornamental design for a candybarcover, as shown and described.
FIG. 1 is a perspective view showing my new design;
FIG. 2 is a top elevational view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a side plan view thereof;
FIG. 5 is a back plan view thereof; and,
FIG. 6 is a back elevational view thereof.
The broken line showing of portions of the candy bar cover is included for the purpose of illustrating environmental structure and forms no part of the claimed design.