HasAdmins.sol

pragma solidity ^0.4.18;

import 'zeppelin-solidity/contracts/ownership/Ownable.sol';

contract HasAdmins is Ownable {
    mapping (address => bool) public admins;

    event AdminAdded(address indexed newAdmin);
    event AdminRemoved(address indexed admin);

    function HasAdmins() public {
        admins[owner] = true;
    }

    modifier onlyAdmins() {
        require(admins[msg.sender]);
        _;
    }

    function addAdmin (address _admin) onlyOwner public {
        admins[_admin] = true;
        AdminAdded(_admin);
    }

    function removeAdmin (address _admin) onlyOwner public {
        delete admins[_admin];
        AdminRemoved(_admin);
    }
}