According to https://github.com/box/spout/pull/630#issuecomment-474463226

src/Spout/Writer/Common/Creator/WriterEntityFactory.php

@@ -25,6 +25,31 @@ class WriterEntityFactory
         return (new WriterFactory())->create($writerType);
     }
 
+    /**
+     * @return \Box\Spout\Writer\CSV\Writer
+     */
+    public static function createCSVWriter()
+    {
+        return (new WriterFactory())->getCSVWriter();
+    }
+
+    /**
+     * @return \Box\Spout\Writer\XLSX\Writer
+     */
+    public static function createXLSXWriter()
+    {
+        return (new WriterFactory())->getXLSXWriter();
+    }
+
+    /**
+     * @return \Box\Spout\Writer\ODS\Writer
+     */
+    public static function createODSWriter()
+    {
+        return (new WriterFactory())->getODSWriter();
+    }
+
+
     /**
      * @param Cell[] $cells
      * @param Style|null $rowStyle

src/Spout/Writer/Common/Creator/WriterFactory.php

@@ -47,7 +47,7 @@ class WriterFactory
     /**
      * @return CSVWriter
      */
-    private function getCSVWriter()
+    public function getCSVWriter()
     {
         $optionsManager = new CSVOptionsManager();
         $globalFunctionsHelper = new GlobalFunctionsHelper();
@@ -60,7 +60,7 @@ class WriterFactory
     /**
      * @return XLSXWriter
      */
-    private function getXLSXWriter()
+    public function getXLSXWriter()
     {
         $styleBuilder = new StyleBuilder();
         $optionsManager = new XLSXOptionsManager($styleBuilder);
@@ -75,7 +75,7 @@ class WriterFactory
     /**
      * @return ODSWriter
      */
-    private function getODSWriter()
+    public function getODSWriter()
     {
         $styleBuilder = new StyleBuilder();
         $optionsManager = new ODSOptionsManager($styleBuilder);