diff --git a/lib/private/preview/bmp.php b/lib/private/Preview/BMP.php
similarity index 100%
rename from lib/private/preview/bmp.php
rename to lib/private/Preview/BMP.php
diff --git a/lib/private/preview/bitmap.php b/lib/private/Preview/Bitmap.php
similarity index 100%
rename from lib/private/preview/bitmap.php
rename to lib/private/Preview/Bitmap.php
diff --git a/lib/private/preview/font.php b/lib/private/Preview/Font.php
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rename from lib/private/preview/font.php
rename to lib/private/Preview/Font.php
diff --git a/lib/private/preview/gif.php b/lib/private/Preview/GIF.php
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rename from lib/private/preview/gif.php
rename to lib/private/Preview/GIF.php
diff --git a/lib/private/preview/illustrator.php b/lib/private/Preview/Illustrator.php
similarity index 100%
rename from lib/private/preview/illustrator.php
rename to lib/private/Preview/Illustrator.php
diff --git a/lib/private/preview/image.php b/lib/private/Preview/Image.php
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rename from lib/private/preview/image.php
rename to lib/private/Preview/Image.php
diff --git a/lib/private/preview/jpeg.php b/lib/private/Preview/JPEG.php
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rename from lib/private/preview/jpeg.php
rename to lib/private/Preview/JPEG.php
diff --git a/lib/private/preview/mp3.php b/lib/private/Preview/MP3.php
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rename from lib/private/preview/mp3.php
rename to lib/private/Preview/MP3.php
diff --git a/lib/private/preview/msoffice2003.php b/lib/private/Preview/MSOffice2003.php
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rename from lib/private/preview/msoffice2003.php
rename to lib/private/Preview/MSOffice2003.php
diff --git a/lib/private/preview/msoffice2007.php b/lib/private/Preview/MSOffice2007.php
similarity index 100%
rename from lib/private/preview/msoffice2007.php
rename to lib/private/Preview/MSOffice2007.php
diff --git a/lib/private/preview/msofficedoc.php b/lib/private/Preview/MSOfficeDoc.php
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rename from lib/private/preview/msofficedoc.php
rename to lib/private/Preview/MSOfficeDoc.php
diff --git a/lib/private/preview/markdown.php b/lib/private/Preview/MarkDown.php
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rename from lib/private/preview/markdown.php
rename to lib/private/Preview/MarkDown.php
diff --git a/lib/private/preview/movie.php b/lib/private/Preview/Movie.php
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rename from lib/private/preview/movie.php
rename to lib/private/Preview/Movie.php
diff --git a/lib/private/preview/office.php b/lib/private/Preview/Office.php
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rename from lib/private/preview/office.php
rename to lib/private/Preview/Office.php
diff --git a/lib/private/preview/opendocument.php b/lib/private/Preview/OpenDocument.php
similarity index 100%
rename from lib/private/preview/opendocument.php
rename to lib/private/Preview/OpenDocument.php
diff --git a/lib/private/preview/pdf.php b/lib/private/Preview/PDF.php
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rename from lib/private/preview/pdf.php
rename to lib/private/Preview/PDF.php
diff --git a/lib/private/preview/png.php b/lib/private/Preview/PNG.php
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rename from lib/private/preview/png.php
rename to lib/private/Preview/PNG.php
diff --git a/lib/private/preview/photoshop.php b/lib/private/Preview/Photoshop.php
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rename from lib/private/preview/photoshop.php
rename to lib/private/Preview/Photoshop.php
diff --git a/lib/private/preview/postscript.php b/lib/private/Preview/Postscript.php
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rename from lib/private/preview/postscript.php
rename to lib/private/Preview/Postscript.php
diff --git a/lib/private/preview/provider.php b/lib/private/Preview/Provider.php
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rename from lib/private/preview/provider.php
rename to lib/private/Preview/Provider.php
diff --git a/lib/private/preview/svg.php b/lib/private/Preview/SVG.php
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rename from lib/private/preview/svg.php
rename to lib/private/Preview/SVG.php
diff --git a/lib/private/preview/staroffice.php b/lib/private/Preview/StarOffice.php
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rename from lib/private/preview/staroffice.php
rename to lib/private/Preview/StarOffice.php
diff --git a/lib/private/preview/tiff.php b/lib/private/Preview/TIFF.php
similarity index 100%
rename from lib/private/preview/tiff.php
rename to lib/private/Preview/TIFF.php
diff --git a/lib/private/preview/txt.php b/lib/private/Preview/TXT.php
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rename from lib/private/preview/txt.php
rename to lib/private/Preview/TXT.php
diff --git a/lib/private/preview/xbitmap.php b/lib/private/Preview/XBitmap.php
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rename from lib/private/preview/xbitmap.php
rename to lib/private/Preview/XBitmap.php