Problem creating and importing a new library

I'm trying to create a new lib, but I'm having terrible issues.

When I try to import it, my code gets like

#include <

and Java crashes and starts to throw a lot of errors.

Here's the code of the .cpp

#include "Arduino.h"
#include "MidiMedia.h"


MidiMedia::MidiMedia(byte channel) {
  byte aux;
  byte pins[12] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13};

  this.midiChannel = channel;

  this.setKeyPins(pins);

  for(aux = 0; aux <= 11; aux++) {
	this.keyNotes[aux] = C + aux;
  }

  for(aux = 0; aux <= 11; aux++) { // Declara pinos de botões como saída com pull-up habilitado
    pinMode(this.keyPins[aux], INPUT_PULLUP);
  } 
  pinMode(UPPER_TRANSPOSER_BUTTON, INPUT_PULLUP); 
  pinMode(LOWER_TRANSPOSER_BUTTON, INPUT_PULLUP); 

  Serial.begin(115200); // Inicia comunicação serial
}

/*
*
*
MidiMedia::MidiMedia(byte channel, byte pins[12]) {
  byte aux;

  midiChannel = channel;

  this.setKeyPins(pins);

  for(aux = 0; aux <= 11; aux++) {
	this.keyNotes[aux] = C + aux;
  }

  for(aux = 0; aux <= 11; aux++) { // Declara pinos de botões como saída com pull-up habilitado
    pinMode(this.keyPins[aux], INPUT_PULLUP);
  } 
  pinMode(UPPER_TRANSPOSER_BUTTON, INPUT_PULLUP); 
  pinMode(LOWER_TRANSPOSER_BUTTON, INPUT_PULLUP); 

  Serial.begin(115200); // Inicia comunicação serial
}
*
*
*/

void MidiMedia::transferData(byte midiFunction, byte pitch, byte velocity) 
{ // Envia o dado MIDI por serial
  byte midiMessage = midiFunction + this.midiChannel; // Associa o dado ao canal MIDI

  Serial.write(midiMessage);
  Serial.write(pitch);
  Serial.write(velocity);
  delay(1);
}

void MidiMedia::transpose(int transposer) 
{
  byte aux;
  for(aux = 0; aux <= 11; aux++) {
    this.keyNotes[aux] += transposer;
  }
}

void MidiMedia::setKeyPins(byte pins[12]) 
{
  byte aux;
  for(aux = 0; aux <= 11; aux++) {
    this.keyPins[aux] = pins[aux];
  }
}

and the .h

/* Midi.h
 * Biblioteca para envio de pacotes MIDI para o computador através da porta serial
 * Otimizada para utilização com o shield MIDI Basics
 * Desenvolvido por Jonathan Lopes Florêncio
 * Universidade do Estado de Santa Catarina
*/

#ifndef MidiMedia_h
#define MidiMedia_h

#include "Arduino.h"

// Botões do transposer
#define UPPER_TRANSPOSER_BUTTON 15
#define LOWER_TRANSPOSER_BUTTON 14

// Botões das notas musicais
#define BUTTON_C    02
#define BUTTON_Cs   03
#define BUTTON_Db   03
#define BUTTON_D    04
#define BUTTON_Ds   05
#define BUTTON_Eb   05
#define BUTTON_E    06
#define BUTTON_Fa   07
#define BUTTON_Fs   08
#define BUTTON_Gb   08
#define BUTTON_G    09
#define BUTTON_Gs   10
#define BUTTON_Ab   10
#define BUTTON_A    11
#define BUTTON_As   12
#define BUTTON_Bb   12
#define BUTTON_B    13

// Notas musicais padrão - oitava central
#define C    60
#define Cs   61
#define Db   61
#define D    62
#define Ds   63
#define Eb   63
#define E    64
#define Fa   65
#define Fs   66
#define Gb   66
#define G    67
#define Gs   68
#define Ab   68
#define A    69
#define As   70
#define Bb   70
#define B    71

// Recursos do programa
#define MAX_VELOCITY 127
#define STANDARD_VELOCITY 64
#define ZERO_VELOCITY 0

// Funções MIDI
#define MIDI_NOTE_ON 0x90
#define MIDI_NOTE_OFF 0x80
#define MIDI_AFTERTOUCH 0xA0
#define MIDI_CONTINUOS_CONTROLLER 0xB0
#define MIDI_PATCH_CHANGE 0xC0
#define MIDI_CHANNEL_PRESSURE 0xD0
#define MIDI_PITCH_BEND 0xE0
#define MIDI_NON_MUSICAL_COMMANDS 0xF0

// Canais MIDI
#define MIDI_CHANNEL_00 0x00
#define MIDI_CHANNEL_01 0x01
#define MIDI_CHANNEL_02 0x02
#define MIDI_CHANNEL_03 0x03
#define MIDI_CHANNEL_04 0x04
#define MIDI_CHANNEL_05 0x05
#define MIDI_CHANNEL_06 0x06
#define MIDI_CHANNEL_07 0x07
#define MIDI_CHANNEL_08 0x08
#define MIDI_CHANNEL_09 0x09
#define MIDI_CHANNEL_10 0x0A
#define MIDI_CHANNEL_11 0x0B
#define MIDI_CHANNEL_12 0x0C
#define MIDI_CHANNEL_13 0x0D
#define MIDI_CHANNEL_14 0x0E
#define MIDI_CHANNEL_15 0x0F

class MidiMedia {
  public:
    MidiMedia(byte channel);
    void transferData(byte midiFunction, byte pitch, byte velocity);
    void transpose(int transposer);
    byte keyPins[12];
    byte keyNotes[12];
    byte midiChannel;
};

#endif // MidiMedia.h

I don't know much abuot OOP, so these "class" things are kinda new for me. Does someone know what could be the problem?

There's something funny about the IDE and half-completed lines.

Try typing that line into something else (eg. Notepad) and then copying and pasting the whole thing at once.

eg.

#include <MidiMedia.h>