DirectX Initialization Null Pointer Error

[Drewtabaga]

Hi. I've been following braynzarsoft.net's DirectX 11 tutorials and he puts all of his code into one file, but I've been separating it into separate files for easier management later on. I got the window to launch perfectly fine and such but now when I added the code to manage DirectX it launches the window for about a quarter of a second then it minimizes and says "Unhandled exception at 0x00E62010 in perception.exe: 0xC0000005: Access violation reading location 0x00000000." When I look at the locals that are being recognized as null and causing the problem, they are the objects d3dDevice, swapChain, and renderTargetView. How can I stop them from becoming null when they are used in the DirectX initialization? Here's my code:
main.cpp
http://pastebin.com/qGP6DUFn
window.cpp
http://pastebin.com/M7dTs7fA
window.h
http://pastebin.com/LZZUE3eB
dxmanager.cpp
http://pastebin.com/9Nb2YddF
dxmanager.h
http://pastebin.com/6v3nQb7h