Each device has:
- Name (long/short)
- Manufacturer (long/short)
- Category (one master list, each bus type maps its device types onto the master list)
- Driver used
- Device paths
- Its bus type
- Its connection parent, if applicable

Each source has: (currently the RescanDevices method does this)
- Init function
- Scan method that returns the devices.
- DevManSource, USBSource, FWSource, ...

DeviceManager Specification
===========================

DeviceManager : BApplication
-------------

DeviceManagerView : BView
-----------------


Device : public BStringItem
------
BString GetName() const;
BString GetManufacturer() const;
Category GetCategory() const;
BString DriverUsed() const;
BString DevPathsPublished() const;
BView Get
private:
BString _name;
BString _manufacturer;
Category _category;
BString _driverUsed;
BString devPathsPublished;
map<BString, BString> _attributes;

Bus : public BStringItem
---
virtual bool IsPresent() const = 0;
virtual Scan() = 0;
virtual vector<Device *> Devices() = 0;

PCIBus : public Bus
------

PCIDevice: public Device
---------

ISABus : public Bus
-----

ISADevice : public Device
---------

USBBus : public Bus
------

USBDevice : public Device
---------

SCSIBus : public Bus
-------

SCSIDevice : public Device
----------