<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<div class="col-md-12">
<div class="panel panel-primary">
<div class="panel-heading">
<div class="btn-group">
<button type="button" class="btn btn-default" data-toggle="tooltip" title="New file">
<i class="fa fa-file-o"></i>
</button>
<button type="button" class="btn btn-default" data-toggle="tooltip" title="Save">
<i class="fa fa-save"></i>
</button>
<button type="button" class="btn btn-default" data-toggle="tooltip" title="Print">
<i class="fa fa-print"></i>
</button>
<button type="button" class="btn btn-default" data-toggle="tooltip" title="Source code">
<i class="fa fa-code"></i> Source
</button>
</div>
<div class="btn-group">
<button type="button" class="btn btn-default" data-toggle="tooltip" title="Bold">
<i class="fa fa-bold"></i>
</button>
<button type="button" class="btn btn-default" data-toggle="tooltip" title="Italic">
<i class="fa fa-italic"></i>
</button>
<button type="button" class="btn btn-default" data-toggle="tooltip" title="Underline">
<i class="fa fa-underline"></i>
</button>
<button type="button" class="btn btn-default" data-toggle="tooltip" title="Strikethrough">
<i class="fa fa-strikethrough"></i>
</button>