contract Crowdsale {
    using SafeMath for uint256;

    // The token being sold
    MintableToken public token;

    // start and end timestamps where investments are allowed (both inclusive)
    uint256 public startTime;
    uint256 public endTime;

    // address where funds are collected
    address public wallet;

    // amount of raised money in wei
    uint256 public weiRaised;

    /**
     * event for token purchase logging
     * @param purchaser who paid for the tokens
     * @param beneficiary who got the tokens
     * @param value weis paid for purchase
     * @param amount amount of tokens purchased
     */
    event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);


    function Crowdsale(uint256 _endTime, address _wallet) {

        require(_endTime >= now);
        require(_wallet != 0x0);

        token = createTokenContract();
        endTime = _endTime;
        wallet = _wallet;
    }

    // creates the token to be sold.
    // override this method to have crowdsale of a specific mintable token.
    function createTokenContract() internal returns (BethereumToken) {
        return new BethereumToken();
    }


    // fallback function can be used to buy tokens
    function () payable {
        buyTokens(msg.sender);
    }

    // low level token purchase function
    function buyTokens(address beneficiary) public payable {  }

    // send ether to the fund collection wallet
    // override to create custom fund forwarding mechanisms
    function forwardFunds() internal {
        wallet.transfer(msg.value);
    }

    // @return true if the transaction can buy tokens
    function validPurchase() internal constant returns (bool) {
        bool withinPeriod = now >= startTime && now <= endTime;
        bool nonZeroPurchase = msg.value != 0;
        return withinPeriod && nonZeroPurchase;
    }

    // @return true if crowdsale event has ended
    function hasEnded() public constant returns (bool) {
        return now > endTime;
    }
}
/**
 * @title Crowdsale
 * @dev Crowdsale is a base contract for managing a token crowdsale.
 * Crowdsales have a start and end timestamps, where investors can make
 * token purchases and the crowdsale will assign them tokens based
 * on a token per ETH rate. Funds collected are forwarded to a wallet
 * as they arrive.
 */
function createTokenContract() internal returns (BethereumToken) {
        return new BethereumToken();
    }
// creates the token to be sold.
// override this method to have crowdsale of a specific mintable token.