Some minor refactoring

Author: rampatra

src/main/java/com/rampatra/misc/Parenthesis.java renamed to src/main/java/com/rampatra/misc/BalancingParenthesis.java

@@ -8,11 +8,10 @@
 /**
  * Created by IntelliJ IDEA.
  *
- * @author: ramswaroop
- * @date: 9/15/15
- * @time: 11:15 PM
+ * @author ramswaroop
+ * @since 9/15/15
  */
-public class Parenthesis {
+public class BalancingParenthesis {
 
     private static final char L_PAREN = '(';
     private static final char R_PAREN = ')';
@@ -84,7 +83,6 @@ public static void readFile(String filePath) {
      */
     public static void main(String a[]) {
         readFile(a[0]);
-        System.exit(0);
     }
 }
 

src/main/java/com/rampatra/strings/StringPermutations.java renamed to src/main/java/com/rampatra/permutations/StringPermutations.java

@@ -1,4 +1,4 @@
-package com.rampatra.strings;
+package com.rampatra.permutations;
 
 /**
  * Created by IntelliJ IDEA.

src/main/java/com/rampatra/strings/StringPermutationsCount.java renamed to src/main/java/com/rampatra/permutations/StringPermutationsCount.java

@@ -1,4 +1,4 @@
-package com.rampatra.strings;
+package com.rampatra.permutations;
 
 /**
  * Created by IntelliJ IDEA.

src/main/java/com/rampatra/strings/UppercaseLowercasePermutations.java renamed to src/main/java/com/rampatra/permutations/UppercaseLowercasePermutations.java

@@ -1,4 +1,4 @@
-package com.rampatra.strings;
+package com.rampatra.permutations;
 
 /**
  * Created by IntelliJ IDEA.
@@ -26,14 +26,12 @@ public static void printUppercaseLowercasePermutations(String prefix, String s)
             return;
         }
 
-        if (!isNumber(s.charAt(0))) {
+        if (isNumber(s.charAt(0))) {
+            printUppercaseLowercasePermutations(prefix + s.charAt(0), s.substring(1));
+        } else {
             printUppercaseLowercasePermutations(prefix + Character.toUpperCase(s.charAt(0)), s.substring(1));
             printUppercaseLowercasePermutations(prefix + Character.toLowerCase(s.charAt(0)), s.substring(1));
-        } else {
-            printUppercaseLowercasePermutations(prefix + s.charAt(0), s.substring(1));
-
         }
-
     }
 
     public static boolean isNumber(char s) {