Как правильно написать Try and Catch

package matrix;
/**
 *
 * @author Den
 */
    public class Main {
    public static void main(String[] args) {
        Matrix m1 = new Matrix(3, 3);
        try {
            m1.put(0, 0, 100);
            m1.put(0, 1, -5);
            m1.put(0, 2, 0);
            m1.put(1, 0, 100005);
            m1.put(1, 1, -20);
            m1.put(1, 2, 64);
            m1.put(2, 0, 199910);
            m1.put(2, 1, -35);
            m1.put(100, 1000, 128);
        } catch (MatrixIndex)
            {
            }
            System.out.println(m1.toString());
            Matrix m2 = new Matrix(m1);
            System.out.println(m2.toString());
            System.out.println(m1.equals(m2));
            Matrix m3 = new Matrix(2, 2);
            m3.put(0, 0, 10);
            m3.put(0, 1, 53);
            m3.put(1, 0, 20);
            m3.put(1, 1, 106);
            System.out.println(m3.toString());
            System.out.println(m1.equals(m3));
        }
    }

 }

второй файл кода если хотите понять:

package matrix;
/**
 *
 * @author Den
 */
public class Matrix {
    private int row;
    private int col;
    private int[][] data;
    Matrix(int row, int col) {
        this.row = row;
        this.col = col;
        data = new int[row][col];
    }
    Matrix(Matrix matrix) {
        this.row = matrix.getRow();
        this.col = matrix.getCol();
        data = new int[row][col];
        for (int i = 0; i < row; i++) {
            for (int j = 0; j < col; j++) {
                data[i][j] = matrix.data[i][j];
            }
        }
    }
    public int get(int row, int col) {
        return data[row][col];
    }
    void put(int row, int col, int value) {
        data[row][col] = value;
    }
    private int getRow() {
        return row;
    }
    private int getCol() {
        return col;
    }
    @Override
    public boolean equals(Object obj) {
        Matrix m = (Matrix) obj;
        if (m.getRow() != row || m.getCol() != col) {
            return false;
        }
        for (int i = 0; i < row; i++) {
            for (int j = 0; j < col; j++) {
                if (data[i][j] != m.data[i][j]) {
                    return false;
                }
            }
        }
        return true;
    }
    @Override
    public String toString() {
        StringBuilder out = new StringBuilder();
        out.append("Matrix:\n[ ");
        for (int i = 0; i < row; i++) {
            if (i != 0) {
                out.append("\n");
                out.append("  ");
            }
            for (int j = 0; j < col; j++) {
                out.append(data[i][j]);
                if (j == col - 1) continue;
                for (int k = 0; k < getMaxLength() - getIntLength(data[i][j]) + 2; k++) {
                    out.append(" ");
                }
            }
        }
        out.append("  ]");
        return out.toString();
    }
    private int getMaxLength() {
        int max = Integer.MIN_VALUE;
        for (int i = 0; i < row; i++) {
            for (int j = 0; j < col; j++) {
                int k = data[i][j];
                if (k > max) {
                    max = k;
                }
            }
        }
        return getIntLength(max);
    }
    private int getIntLength(int i) {
        return String.valueOf(i).length();
    }