diff --git a/src/main/java/org/libj/math/LongDecimal.java b/src/main/java/org/libj/math/LongDecimal.java
index 5a96b859..8096352e 100644
--- a/src/main/java/org/libj/math/LongDecimal.java
+++ b/src/main/java/org/libj/math/LongDecimal.java
@@ -1,3 +1,19 @@
+/* Copyright (c) 2020 LibJ
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * You should have received a copy of The MIT License (MIT) along with this
+ * program. If not, see <http://opensource.org/licenses/MIT/>.
+ */
+
 package org.libj.math;
 
 import java.math.BigDecimal;
@@ -6,6 +22,9 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+/**
+ * Fixed point representation of a decimal encoded in a {@code long}.
+ */
 public final class LongDecimal {
   private static final Logger logger = LoggerFactory.getLogger(LongDecimal.class);
   private static final long[] e10 = {1L, 10L, 100L, 1000L, 10000L, 100000L, 1000000L, 10000000L, 100000000L, 1000000000L, 10000000000L, 100000000000L, 1000000000000L, 10000000000000L, 100000000000000L, 1000000000000000L, 10000000000000000L, 100000000000000000L, 1000000000000000000L};
diff --git a/src/test/java/org/libj/math/LongDecimalTest.java b/src/test/java/org/libj/math/LongDecimalTest.java
index 9b361eb9..5fad7bd0 100644
--- a/src/test/java/org/libj/math/LongDecimalTest.java
+++ b/src/test/java/org/libj/math/LongDecimalTest.java
@@ -1,3 +1,19 @@
+/* Copyright (c) 2020 LibJ
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * You should have received a copy of The MIT License (MIT) along with this
+ * program. If not, see <http://opensource.org/licenses/MIT/>.
+ */
+
 package org.libj.math;
 
 import static org.junit.Assert.*;