fix checkstyle issues

Author: Sufi-san

src/main/java/com/thealgorithms/conversions/WordsToNumber.java

@@ -171,7 +171,9 @@ private static BigDecimal convertWordQueueToBigDecimal(ArrayDeque<String> wordDe
         List<BigDecimal> chunks = new ArrayList<>();
 
         boolean isNegative = "negative".equals(wordDeque.peek());
-        if (isNegative) wordDeque.poll();
+        if (isNegative) {
+            wordDeque.poll();
+        }
 
         boolean prevNumWasHundred = false;
         boolean prevNumWasPowerOfTen = false;
@@ -189,6 +191,9 @@ private static BigDecimal convertWordQueueToBigDecimal(ArrayDeque<String> wordDe
                     prevNumWasHundred = true;
                     continue;
                 }
+                default -> {
+
+                }
             }
             prevNumWasHundred = false;
 
@@ -213,7 +218,12 @@ private static BigDecimal convertWordQueueToBigDecimal(ArrayDeque<String> wordDe
                     currentChunk = BigDecimal.ZERO;
                     continue;
                 }
-                case "negative" -> handleNegative(isNegative);
+                case "negative" -> {
+                    handleNegative(isNegative);
+                }
+                default -> {
+
+                }
             }
 
             throw new WordsToNumberException(WordsToNumberException.ErrorType.UNKNOWN_WORD, word);
@@ -224,7 +234,8 @@ private static BigDecimal convertWordQueueToBigDecimal(ArrayDeque<String> wordDe
         }
 
         BigDecimal completeNumber = combineChunks(chunks);
-        return isNegative ? completeNumber.multiply(BigDecimal.valueOf(-1)) :
+        return isNegative ? completeNumber.multiply(BigDecimal.valueOf(-1))
+                :
                     completeNumber;
                 }
 

src/test/java/com/thealgorithms/conversions/WordsToNumberTest.java

@@ -1,7 +1,6 @@
 package com.thealgorithms.conversions;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import java.math.BigDecimal;