Add HasNoContracts

contracts/ownership/HasNoContracts.sol

+pragma solidity ^0.4.8;
+
+import "./Ownable.sol";
+
+/// @title Contracts that should not own Contracts
+/// @author Remco Bloemen <remco@2π.com>
+///
+/// Should contracts (anything Ownable) end up being owned by
+/// this contract, it allows the owner of this contract to
+/// reclaim ownership of the contracts.
+contract HasNoContracts is Ownable {
+
+  /// Reclaim ownership of Ownable contracts
+  function reclaimContract(address contractAddr) external onlyOwner {
+    Ownable contractInst = Ownable(contractAddr);
+    contractInst.transferOwnership(owner);
+  }
+}

test/HasNoContracts.js

+'use strict';
+import expectThrow from './helpers/expectThrow';
+import toPromise from './helpers/toPromise';
+const Ownable = artifacts.require('../contracts/ownership/Ownable.sol');
+const HasNoContracts = artifacts.require(
+  '../contracts/ownership/HasNoContracts.sol',
+);
+
+contract('HasNoContracts', function(accounts) {
+  let hasNoContracts = null;
+  let ownable = null;
+
+  beforeEach(async () => {
+    // Create contract and token
+    hasNoContracts = await HasNoContracts.new();
+    ownable = await Ownable.new();
+
+    // Force ownership into contract
+    await ownable.transferOwnership(hasNoContracts.address);
+    const owner = await ownable.owner();
+    assert.equal(owner, hasNoContracts.address);
+  });
+
+  it('should allow owner to reclaim contracts', async function() {
+    await hasNoContracts.reclaimContract(ownable.address);
+    const owner = await ownable.owner();
+    assert.equal(owner, accounts[0]);
+  });
+
+  it('should allow only owner to reclaim contracts', async function() {
+    await expectThrow(
+      hasNoContracts.reclaimContract(ownable.address, {from: accounts[1]}),
+    );
+  });
+});