diff --git a/src/algoritmos/MergeSort.java b/src/algoritmos/MergeSort.java
index a1ad3c3..56b49c8 100644
--- a/src/algoritmos/MergeSort.java
+++ b/src/algoritmos/MergeSort.java
@@ -2,7 +2,7 @@
 
 import java.io.IOException;
 
-public class Mergesort {
+public class MergeSort {
 
 	public static void main(String[] args) throws IOException {
 		int quantidade = 10000;
@@ -45,7 +45,9 @@ private static void mergeSort(int[] a, int n) {
 	private static void merge(
       int[] a, int[] l, int[] r, int left, int right) {
      
-        int i = 0, j = 0, k = 0;
+        int i = 0;
+        int j = 0;
+        int  k = 0;
         while (i < left && j < right) {
             if (l[i] <= r[j]) {
                 a[k++] = l[i++];
diff --git a/src/algoritmos/Quicksort.java b/src/algoritmos/Quicksort.java
index 9f109aa..393af0f 100644
--- a/src/algoritmos/Quicksort.java
+++ b/src/algoritmos/Quicksort.java
@@ -30,7 +30,8 @@ private static void quickSort(int[] vetor, int inicio, int fim) {
 
 	private static int posicaoPivor(int[] vetor, int inicio, int fim) {
 		int pivo = vetor[inicio];
-		int i = inicio + 1, f = fim;
+		int i = inicio + 1;
+        int f = fim;
 		while (i <= f) {
 			if (vetor[i] <= pivo)
 				i++;
diff --git a/src/algoritmos/SelectionSort.java b/src/algoritmos/SelectionSort.java
index c7d5ef7..c4d1ba7 100644
--- a/src/algoritmos/SelectionSort.java
+++ b/src/algoritmos/SelectionSort.java
@@ -1,7 +1,5 @@
 package algoritmos;
 
-import java.io.IOException;
-
 public class SelectionSort {
 
 	public static void main(String args[]) {
diff --git a/src/exemplos/Main.java b/src/exemplos/Main.java
new file mode 100644
index 0000000..0404f18
--- /dev/null
+++ b/src/exemplos/Main.java
@@ -0,0 +1,47 @@
+package exemplos;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class Main {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		f(10);
+		readFile("");
+		validarString("omnilink");
+	}
+
+	public static long f(int n) {
+		if (n < 2) {
+            return n;
+        } else {
+            return f(n - 1) + f(n - 2);
+        }
+    }
+	
+	public static String readFile(String fileName){ 
+	    BufferedReader br; 
+	    try { 
+	        br = new BufferedReader(new FileReader(fileName)); 
+	        final StringBuilder sb = new StringBuilder(); 
+	        String line = br.readLine(); 
+	 
+	        while (line != null) { 
+	            sb.append(line); 
+	            sb.append(System.lineSeparator()); 
+	            line = br.readLine(); 
+	        } 
+	        br.close(); 
+	        return sb.toString(); 
+	    } catch (IOException e) { 
+	        e.printStackTrace(); 
+	    } 
+	    return ""; 
+	}
+	
+	public static boolean validarString(String entrada) {
+    	return entrada != null && !entrada.equals("") && entrada.length() > 3;
+	}
+}