custom master page, content coming after footer

Question

I have created a HTML page using bootstrap and custom CSS. Assigned it as SharePoint master page but the SharePoint content is coming below the footer. Below are the HTML code, I used.

I am new to designing as well as SharePoint

<title>Master Page</title>
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
<link rel="stylesheet" href="font-awesome/css/font-awesome.min.css">
<link rel="stylesheet" href="style.css">

<script src="bootstrap/js/jquery.min.js"></script>
<script src="bootstrap/js/bootstrap.min.js"></script>   

<header>
    <div class="header-wrapper">
        <div class="site-name">
            <h1>sitename</h1>       
        </div>
    </div>
        <nav class="navbar navbar-inverse">
            <div class="container-fluid">
                <div class="navbar-header">
                    <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#mynavbar">
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                    </button>
                </div>
                <div class="navbar-collapse collapse" id="mynavbar">
                    <ul class="nav navbar-nav"> 
                        <li><a href="#">Home</a></li>
                        <li><a href="#">About</a></li>
                        <li><a href="#">Services</a></li>
                        <li><a href="#">Account</a></li>
                        <li><a href="#">Portfolio</a></li>
                        <li><a href="#">Contact</a></li>
                    </ul>
                    <ul class="nav navbar-nav navbar-right">
                        <li><a href="#"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
                    </ul>
                </div>
            </div>
        </nav>
</header>

<footer>
    <div class="footer-wrapper">
        <div class="site-content">
            <div class="container">
                <div class="row">
                    <div class="block col-md-2 col-sm-6"></div>
                    <div class="block col-md-2 col-sm-6"></div>
                    <div class="block col-md-2 col-sm-6"></div>
                    <div class="block col-md-3"></div>
                    <div class="block col-md-3">
                    </div>
                </div>
            </div>
        </div>
        <div class="copy-right">
            <div class="container">
                <div class="row">
                    <div class="col-md-6">
                        CopyRights(c)
                        <a href="#">www.abc.com</a>
                    </div>
                </div>
            </div>
        </div>
    </div>
</footer>   

Answer 1

you please check where are this tags in your master page. this tags should be align with your design <div id="s4-workspace"> <div id="s4-bodyContainer">

and <div data-name="ContentPlaceHolderMain"> this should place your sharepoint content. please check below the modified html

<div data-name="ContentPlaceHolderMain"> <div class="site-content">
            <div class="container">
                <div class="row">
                    <div class="block col-md-2 col-sm-6"></div>
                    <div class="block col-md-2 col-sm-6"></div>
                    <div class="block col-md-2 col-sm-6"></div>
                    <div class="block col-md-3"></div>
                    <div class="block col-md-3">
                    </div>
                </div>
            </div>
</div>