diff --git a/src/PhpSpreadsheet/Reader/BaseReader.php b/src/PhpSpreadsheet/Reader/BaseReader.php
new file mode 100644
index 00000000..807151f6
--- /dev/null
+++ b/src/PhpSpreadsheet/Reader/BaseReader.php
@@ -0,0 +1,291 @@
+<?php
+
+namespace PHPExcel\Reader;
+
+/**
+ * PHPExcel_Reader_BaseReader
+ *
+ * Copyright (c) 2006 - 2015 PHPExcel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * @category   PHPExcel
+ * @package    PHPExcel_Reader
+ * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
+ * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
+ * @version    ##VERSION##, ##DATE##
+ */
+abstract class BaseReader implements IReader
+{
+    /**
+     * Read data only?
+     * Identifies whether the Reader should only read data values for cells, and ignore any formatting information;
+     *        or whether it should read both data and formatting
+     *
+     * @var    boolean
+     */
+    protected $readDataOnly = false;
+
+    /**
+     * Read empty cells?
+     * Identifies whether the Reader should read data values for cells all cells, or should ignore cells containing
+     *         null value or empty string
+     *
+     * @var    boolean
+     */
+    protected $readEmptyCells = true;
+
+    /**
+     * Read charts that are defined in the workbook?
+     * Identifies whether the Reader should read the definitions for any charts that exist in the workbook;
+     *
+     * @var    boolean
+     */
+    protected $includeCharts = false;
+
+    /**
+     * Restrict which sheets should be loaded?
+     * This property holds an array of worksheet names to be loaded. If null, then all worksheets will be loaded.
+     *
+     * @var array of string
+     */
+    protected $loadSheetsOnly;
+
+    /**
+     * IReadFilter instance
+     *
+     * @var IReadFilter
+     */
+    protected $readFilter;
+
+    protected $fileHandle = null;
+
+
+    /**
+     * Read data only?
+     *        If this is true, then the Reader will only read data values for cells, it will not read any formatting information.
+     *        If false (the default) it will read data and formatting.
+     *
+     * @return    boolean
+     */
+    public function getReadDataOnly()
+    {
+        return $this->readDataOnly;
+    }
+
+    /**
+     * Set read data only
+     *        Set to true, to advise the Reader only to read data values for cells, and to ignore any formatting information.
+     *        Set to false (the default) to advise the Reader to read both data and formatting for cells.
+     *
+     * @param    boolean    $pValue
+     *
+     * @return    IReader
+     */
+    public function setReadDataOnly($pValue = false)
+    {
+        $this->readDataOnly = (boolean) $pValue;
+        return $this;
+    }
+
+    /**
+     * Read empty cells?
+     *        If this is true (the default), then the Reader will read data values for all cells, irrespective of value.
+     *        If false it will not read data for cells containing a null value or an empty string.
+     *
+     * @return    boolean
+     */
+    public function getReadEmptyCells()
+    {
+        return $this->readEmptyCells;
+    }
+
+    /**
+     * Set read empty cells
+     *        Set to true (the default) to advise the Reader read data values for all cells, irrespective of value.
+     *        Set to false to advise the Reader to ignore cells containing a null value or an empty string.
+     *
+     * @param    boolean    $pValue
+     *
+     * @return    PHPExcel_Reader_IReader
+     */
+    public function setReadEmptyCells($pValue = true)
+    {
+        $this->readEmptyCells = (boolean) $pValue;
+        return $this;
+    }
+
+    /**
+     * Read charts in workbook?
+     *        If this is true, then the Reader will include any charts that exist in the workbook.
+     *      Note that a ReadDataOnly value of false overrides, and charts won't be read regardless of the IncludeCharts value.
+     *        If false (the default) it will ignore any charts defined in the workbook file.
+     *
+     * @return    boolean
+     */
+    public function getIncludeCharts()
+    {
+        return $this->includeCharts;
+    }
+
+    /**
+     * Set read charts in workbook
+     *        Set to true, to advise the Reader to include any charts that exist in the workbook.
+     *      Note that a ReadDataOnly value of false overrides, and charts won't be read regardless of the IncludeCharts value.
+     *        Set to false (the default) to discard charts.
+     *
+     * @param    boolean    $pValue
+     *
+     * @return    IReader
+     */
+    public function setIncludeCharts($pValue = false)
+    {
+        $this->includeCharts = (boolean) $pValue;
+        return $this;
+    }
+
+    /**
+     * Get which sheets to load
+     * Returns either an array of worksheet names (the list of worksheets that should be loaded), or a null
+     *        indicating that all worksheets in the workbook should be loaded.
+     *
+     * @return mixed
+     */
+    public function getLoadSheetsOnly()
+    {
+        return $this->loadSheetsOnly;
+    }
+
+    /**
+     * Set which sheets to load
+     *
+     * @param mixed $value
+     *        This should be either an array of worksheet names to be loaded, or a string containing a single worksheet name.
+     *        If NULL, then it tells the Reader to read all worksheets in the workbook
+     *
+     * @return IReader
+     */
+    public function setLoadSheetsOnly($value = null)
+    {
+        if ($value === null) {
+            return $this->setLoadAllSheets();
+        }
+
+        $this->loadSheetsOnly = is_array($value) ? $value : array($value);
+        return $this;
+    }
+
+    /**
+     * Set all sheets to load
+     *        Tells the Reader to load all worksheets from the workbook.
+     *
+     * @return IReader
+     */
+    public function setLoadAllSheets()
+    {
+        $this->loadSheetsOnly = null;
+        return $this;
+    }
+
+    /**
+     * Read filter
+     *
+     * @return IReadFilter
+     */
+    public function getReadFilter()
+    {
+        return $this->readFilter;
+    }
+
+    /**
+     * Set read filter
+     *
+     * @param IReadFilter $pValue
+     * @return IReader
+     */
+    public function setReadFilter(IReadFilter $pValue)
+    {
+        $this->readFilter = $pValue;
+        return $this;
+    }
+
+    /**
+     * Open file for reading
+     *
+     * @param string $pFilename
+     * @throws    Exception
+     * @return resource
+     */
+    protected function openFile($pFilename)
+    {
+        // Check if file exists
+        if (!file_exists($pFilename) || !is_readable($pFilename)) {
+            throw new Exception("Could not open " . $pFilename . " for reading! File does not exist.");
+        }
+
+        // Open file
+        $this->fileHandle = fopen($pFilename, 'r');
+        if ($this->fileHandle === false) {
+            throw new Exception("Could not open file " . $pFilename . " for reading.");
+        }
+    }
+
+    /**
+     * Can the current IReader read the file?
+     *
+     * @param     string         $pFilename
+     * @return boolean
+     * @throws Exception
+     */
+    public function canRead($pFilename)
+    {
+        // Check if file exists
+        try {
+            $this->openFile($pFilename);
+        } catch (Exception $e) {
+            return false;
+        }
+
+        $readable = $this->isValidFormat();
+        fclose($this->fileHandle);
+        return $readable;
+    }
+
+    /**
+     * Scan theXML for use of <!ENTITY to prevent XXE/XEE attacks
+     *
+     * @param     string         $xml
+     * @throws Exception
+     */
+    public function securityScan($xml)
+    {
+        $pattern = '/\\0?' . implode('\\0?', str_split('<!DOCTYPE')) . '\\0?/';
+        if (preg_match($pattern, $xml)) {
+            throw new Exception('Detected use of ENTITY in XML, spreadsheet file load() aborted to prevent XXE/XEE attacks');
+        }
+        return $xml;
+    }
+
+    /**
+     * Scan theXML for use of <!ENTITY to prevent XXE/XEE attacks
+     *
+     * @param     string         $filestream
+     * @throws Exception
+     */
+    public function securityScanFile($filestream)
+    {
+        return $this->securityScan(file_get_contents($filestream));
+    }
+}
diff --git a/src/PhpSpreadsheet/Writer/BaseWriter.php b/src/PhpSpreadsheet/Writer/BaseWriter.php
new file mode 100644
index 00000000..690d67b7
--- /dev/null
+++ b/src/PhpSpreadsheet/Writer/BaseWriter.php
@@ -0,0 +1,159 @@
+<?php
+
+namespace PHPExcel\Writer;
+
+/**
+ * \PHPExcel\Writer\BaseWriter
+ *
+ * Copyright (c) 2006 - 2015 PHPExcel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * @category   PHPExcel
+ * @package    PHPExcel_Writer
+ * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
+ * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
+ * @version    ##VERSION##, ##DATE##
+ */
+abstract class BaseWriter implements IWriter
+{
+    /**
+     * Write charts that are defined in the workbook?
+     * Identifies whether the Writer should write definitions for any charts that exist in the PHPExcel object;
+     *
+     * @var    boolean
+     */
+    protected $includeCharts = false;
+
+    /**
+     * Pre-calculate formulas
+     * Forces PHPExcel to recalculate all formulae in a workbook when saving, so that the pre-calculated values are
+     *    immediately available to MS Excel or other office spreadsheet viewer when opening the file
+     *
+     * @var boolean
+     */
+    protected $preCalculateFormulas = true;
+
+    /**
+     * Use disk caching where possible?
+     *
+     * @var boolean
+     */
+    protected $_useDiskCaching = false;
+
+    /**
+     * Disk caching directory
+     *
+     * @var string
+     */
+    protected $_diskCachingDirectory    = './';
+
+    /**
+     * Write charts in workbook?
+     *        If this is true, then the Writer will write definitions for any charts that exist in the PHPExcel object.
+     *        If false (the default) it will ignore any charts defined in the PHPExcel object.
+     *
+     * @return    boolean
+     */
+    public function getIncludeCharts()
+    {
+        return $this->includeCharts;
+    }
+
+    /**
+     * Set write charts in workbook
+     *        Set to true, to advise the Writer to include any charts that exist in the PHPExcel object.
+     *        Set to false (the default) to ignore charts.
+     *
+     * @param    boolean    $pValue
+     * @return   IWriter
+     */
+    public function setIncludeCharts($pValue = false)
+    {
+        $this->includeCharts = (boolean) $pValue;
+        return $this;
+    }
+
+    /**
+     * Get Pre-Calculate Formulas flag
+     *     If this is true (the default), then the writer will recalculate all formulae in a workbook when saving,
+     *        so that the pre-calculated values are immediately available to MS Excel or other office spreadsheet
+     *        viewer when opening the file
+     *     If false, then formulae are not calculated on save. This is faster for saving in PHPExcel, but slower
+     *        when opening the resulting file in MS Excel, because Excel has to recalculate the formulae itself
+     *
+     * @return boolean
+     */
+    public function getPreCalculateFormulas()
+    {
+        return $this->preCalculateFormulas;
+    }
+
+    /**
+     * Set Pre-Calculate Formulas
+     *        Set to true (the default) to advise the Writer to calculate all formulae on save
+     *        Set to false to prevent precalculation of formulae on save.
+     *
+     * @param boolean $pValue    Pre-Calculate Formulas?
+     * @return    IWriter
+     */
+    public function setPreCalculateFormulas($pValue = true)
+    {
+        $this->preCalculateFormulas = (boolean) $pValue;
+        return $this;
+    }
+
+    /**
+     * Get use disk caching where possible?
+     *
+     * @return boolean
+     */
+    public function getUseDiskCaching()
+    {
+        return $this->_useDiskCaching;
+    }
+
+    /**
+     * Set use disk caching where possible?
+     *
+     * @param    boolean     $pValue
+     * @param    string        $pDirectory        Disk caching directory
+     * @throws   Exception    when directory does not exist
+     * @return   IWriter
+     */
+    public function setUseDiskCaching($pValue = false, $pDirectory = null)
+    {
+        $this->_useDiskCaching = $pValue;
+
+        if ($pDirectory !== null) {
+            if (is_dir($pDirectory)) {
+                $this->_diskCachingDirectory = $pDirectory;
+            } else {
+                throw new Exception("Directory does not exist: $pDirectory");
+            }
+        }
+        return $this;
+    }
+
+    /**
+     * Get disk caching directory
+     *
+     * @return string
+     */
+    public function getDiskCachingDirectory()
+    {
+        return $this->_diskCachingDirectory;
+    }
+}