Pet Adoption smart-contract in Solidity

adoption.js

pragma solidity ^0.4.17;

contract Adoption {

	address[16] public adopters;

	function owners() public view returns (address) {
		return adopters;
	}

	function adopt(uint hamId) public returns (uint) {
		require(hamId >= 0 && hamId <= 15);
		adopters[hamId] = msg.sender;

		return hamId;
	}

	function getAdopters() public view returns (address[16]) {
		return adopters;
	}

}