$ touch /usr/share/applications/robomongo.desktop
[Desktop Entry]
Encoding=UTF-8
Type=Application
Name=Robomongo
Icon=/opt/robomongo-0.9.0-linux-x86_64-0786489/bin/robomongo.png
Exec="/opt/robomongo-0.9.0-linux-x86_64-0786489/bin/robomongo"
Comment=Robomongo desktop entry
Categories=Development;
Terminal=false
StartupNotify=true