diff --git a/src/main/java/org/apache/commons/lang3/ObjectUtils.java b/src/main/java/org/apache/commons/lang3/ObjectUtils.java
index c6c6a8e8e..8461ee9b1 100644
--- a/src/main/java/org/apache/commons/lang3/ObjectUtils.java
+++ b/src/main/java/org/apache/commons/lang3/ObjectUtils.java
@@ -803,7 +803,7 @@ public class ObjectUtils {
      *
      * @param appendable  the appendable to append to
      * @param object  the object to create a toString for
-     * @throws IOException if an I/O error occurs
+     * @throws IOException if an I/O error occurs.
      * @since 3.2
      */
     public static void identityToString(final Appendable appendable, final Object object) throws IOException {
diff --git a/src/main/java/org/apache/commons/lang3/text/StrBuilder.java b/src/main/java/org/apache/commons/lang3/text/StrBuilder.java
index 9bf72ed77..d9ec85f22 100644
--- a/src/main/java/org/apache/commons/lang3/text/StrBuilder.java
+++ b/src/main/java/org/apache/commons/lang3/text/StrBuilder.java
@@ -445,7 +445,7 @@ public class StrBuilder implements CharSequence, Appendable, Serializable, Build
      *
      * @param readable  object to read from
      * @return the number of characters read
-     * @throws IOException if an I/O error occurs
+     * @throws IOException if an I/O error occurs.
      *
      * @since 3.4
      * @see #appendTo(Appendable)
diff --git a/src/main/java/org/apache/commons/lang3/time/FastDatePrinter.java b/src/main/java/org/apache/commons/lang3/time/FastDatePrinter.java
index 9778abc7c..9f0e67534 100644
--- a/src/main/java/org/apache/commons/lang3/time/FastDatePrinter.java
+++ b/src/main/java/org/apache/commons/lang3/time/FastDatePrinter.java
@@ -778,7 +778,7 @@ public class FastDatePrinter implements DatePrinter, Serializable {
          *
          * @param buf the output buffer
          * @param calendar calendar to be appended
-         * @throws IOException if an I/O error occurs
+         * @throws IOException if an I/O error occurs.
          */
         void appendTo(Appendable buf, Calendar calendar) throws IOException;
     }
@@ -792,7 +792,7 @@ public class FastDatePrinter implements DatePrinter, Serializable {
          *
          * @param buffer the output buffer
          * @param value the value to be appended
-         * @throws IOException if an I/O error occurs
+         * @throws IOException if an I/O error occurs.
          */
         void appendTo(Appendable buffer, int value) throws IOException;
     }