Can't install MQTT Broker(Mosquitto) on Raspberry Pi

[Danster2020]

All commands work fine untill i reach apt-get update
Source: http://www.instructables.com/id/Installing-MQTT-BrokerMosquitto-on-Raspberry-Pi/

wget http://repo.mosquitto.org/debian/mosquitto-repo.gpg.key
sudo apt-key add mosquitto-repo.gpg.key
cd /etc/apt/sources.list.d/
sudo wget http://repo.mosquitto.org/debian/mosquitto-wheezy.list
sudo -i
apt-get update

When doing apt-get update i get this error:

N: Ignoring file 'mosquitto-jessie.list.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.5' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.4' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.2' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-jessie.list.2' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.3' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

Continuing with the commands i also face this error during apt-get install mosquitto:

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 mosquitto : Depends: libssl1.0.0 (>= 1.0.1) but it is not installable
N: Ignoring file 'mosquitto-jessie.list.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.5' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.4' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.2' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-jessie.list.2' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mosquitto-wheezy.list.3' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
E: Unable to correct problems, you have held broken packages.

Full code input/output:
https://pastebin.com/GQzGgaKD

Any ideas how to resolve this? I've spent a couple of hours trying out different commands with the exact same result.