pragma solidity ^0.4.18;



/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
  address public owner;


  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() public {
    owner = msg.sender;
  }

  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }

  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

/*
 * Manager that stores permitted addresses 
 */
contract PermissionManager is Ownable {
    mapping (address => bool) permittedAddresses;

    function addAddress(address newAddress) public onlyOwner {
        permittedAddresses[newAddress] = true;
    }

    function removeAddress(address remAddress) public onlyOwner {
        permittedAddresses[remAddress] = false;
    }

    function isPermitted(address pAddress) public view returns(bool) {
        if (permittedAddresses[pAddress]) {
            return true;
        }
        return false;
    }
}