ESFL license file added (#56)

Signed-off-by: Dmitry Kornilov <dmitry.kornilov@oracle.com>
diff --git a/api/src/main/javadoc/doc-files/EFSL.html b/api/src/main/javadoc/doc-files/EFSL.html
new file mode 100644
index 0000000..ba29e5e
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+++ b/api/src/main/javadoc/doc-files/EFSL.html
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+<html>
+<head>
+<title>Eclipse Foundation Specification License - v1.0</title>
+</head>
+<body>
+<h1>Eclipse Foundation Specification License - v1.0</h1>
+<p>By using and/or copying this document, or the Eclipse Foundation
+  document from which this statement is linked, you (the licensee) agree
+  that you have read, understood, and will comply with the following
+  terms and conditions:</p>
+
+<p>Permission to copy, and distribute the contents of this document, or
+  the Eclipse Foundation document from which this statement is linked, in
+  any medium for any purpose and without fee or royalty is hereby
+  granted, provided that you include the following on ALL copies of the
+  document, or portions thereof, that you use:</p>
+
+<ul>
+  <li> link or URL to the original Eclipse Foundation document.</li>
+  <li>All existing copyright notices, or if one does not exist, a notice
+      (hypertext is preferred, but a textual representation is permitted)
+      of the form: &quot;Copyright &copy; [$date-of-document]
+      &ldquo;Eclipse Foundation, Inc. &lt;&lt;url to this license&gt;&gt;
+      &quot;
+  </li>
+</ul>
+
+<p>Inclusion of the full text of this NOTICE must be provided. We
+  request that authorship attribution be provided in any software,
+  documents, or other items or products that you create pursuant to the
+  implementation of the contents of this document, or any portion
+  thereof.</p>
+
+<p>No right to create modifications or derivatives of Eclipse Foundation
+  documents is granted pursuant to this license, except anyone may
+  prepare and distribute derivative works and portions of this document
+  in software that implements the specification, in supporting materials
+  accompanying such software, and in documentation of such software,
+  PROVIDED that all such works include the notice below. HOWEVER, the
+  publication of derivative works of this document for use as a technical
+  specification is expressly prohibited.</p>
+
+<p>The notice is:</p>
+
+<p>&quot;Copyright &copy; 2018 Eclipse Foundation. This software or
+  document includes material copied from or derived from [title and URI
+  of the Eclipse Foundation specification document].&quot;</p>
+
+<h2>Disclaimers</h2>
+
+<p>THIS DOCUMENT IS PROVIDED &quot;AS IS,&quot; AND THE COPYRIGHT
+  HOLDERS AND THE ECLIPSE FOUNDATION MAKE NO REPRESENTATIONS OR
+  WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+  WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
+  NON-INFRINGEMENT, OR TITLE; THAT THE CONTENTS OF THE DOCUMENT ARE
+  SUITABLE FOR ANY PURPOSE; NOR THAT THE IMPLEMENTATION OF SUCH CONTENTS
+  WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR
+  OTHER RIGHTS.</p>
+
+<p>THE COPYRIGHT HOLDERS AND THE ECLIPSE FOUNDATION WILL NOT BE LIABLE
+  FOR ANY DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT
+  OF ANY USE OF THE DOCUMENT OR THE PERFORMANCE OR IMPLEMENTATION OF THE
+  CONTENTS THEREOF.</p>
+
+<p>The name and trademarks of the copyright holders or the Eclipse
+  Foundation may NOT be used in advertising or publicity pertaining to
+  this document or its contents without specific, written prior
+  permission. Title to copyright in this document will at all times
+  remain with copyright holders.</p>
+
+</body>
+</html>