diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/BufferCache.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/BufferCache.java
index 0ea76d9..a9b82b0 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/BufferCache.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/BufferCache.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.buffercache;
 
 import java.io.IOException;
@@ -68,10 +82,7 @@
         if (!newPage) {
             if (!cPage.valid) {
                 /*
-                 * We got a buffer and we have pinned it. But its invalid.
-                 * If its a new page, we just mark it as valid and return. Or else,
-                 * while we hold the page lock, we get a write latch on the
-                 * data and start a read.
+                 * We got a buffer and we have pinned it. But its invalid. If its a new page, we just mark it as valid and return. Or else, while we hold the page lock, we get a write latch on the data and start a read.
                  */
                 cPage.acquireWriteLatch(false);
                 try {
@@ -113,37 +124,12 @@
                 bucket.bucketLock.unlock();
             }
             /*
-             * If we got here, the page was not in the hash table.
-             * Now we ask the page replacement strategy to find us a victim.
+             * If we got here, the page was not in the hash table. Now we ask the page replacement strategy to find us a victim.
              */
             CachedPage victim = (CachedPage) pageReplacementStrategy.findVictim();
             if (victim != null) {
                 /*
-                 * We have a victim with the following invariants.
-                 * 1. The dpid on the CachedPage may or may not be valid.
-                 * 2. We have a pin on the CachedPage.
-                 * We have to deal with three cases here.
-                 * Case 1: The dpid on the CachedPage is invalid (-1). This indicates
-                 * that this buffer has never been used. So we are the only ones holding
-                 * it. Get a lock on the required dpid's hash bucket, check if someone inserted
-                 * the page we want into the table. If so, decrement the pincount on the victim
-                 * and return the winner page in the table. If such a winner does not exist,
-                 * insert the victim and return it.
-                 * Case 2: The dpid on the CachedPage is valid.
-                 * Case 2a: The current dpid and required dpid hash to the same bucket.
-                 * Get the bucket lock, check that the victim is still at pinCount == 1
-                 * If so check if there is a winning CachedPage with the required dpid.
-                 * If so, decrement the pinCount on the victim and return the winner.
-                 * If not, update the contents of the CachedPage to hold the required dpid
-                 * and return it. If the picCount on the victim was != 1 or CachedPage was dirty
-                 * someone used the victim for its old contents -- Decrement the pinCount and
-                 * retry.
-                 * Case 2b: The current dpid and required dpid hash to different buckets.
-                 * Get the two bucket locks in the order of the bucket indexes (Ordering prevents
-                 * deadlocks). Check for the existence of a winner in the new bucket and for potential
-                 * use of the victim (pinCount != 1). If everything looks good, remove
-                 * the CachedPage from the old bucket, and add it to the new bucket and update its
-                 * header with the new dpid.
+                 * We have a victim with the following invariants. 1. The dpid on the CachedPage may or may not be valid. 2. We have a pin on the CachedPage. We have to deal with three cases here. Case 1: The dpid on the CachedPage is invalid (-1). This indicates that this buffer has never been used. So we are the only ones holding it. Get a lock on the required dpid's hash bucket, check if someone inserted the page we want into the table. If so, decrement the pincount on the victim and return the winner page in the table. If such a winner does not exist, insert the victim and return it. Case 2: The dpid on the CachedPage is valid. Case 2a: The current dpid and required dpid hash to the same bucket. Get the bucket lock, check that the victim is still at pinCount == 1 If so check if there is a winning CachedPage with the required dpid. If so, decrement the pinCount on the victim and return the winner. If not, update the contents of the CachedPage to hold the required dpid and return it. If the picCount on the victim was != 1 or CachedPage was dirty someone used the victim for its old contents -- Decrement the pinCount and retry. Case 2b: The current dpid and required dpid hash to different buckets. Get the two bucket locks in the order of the bucket indexes (Ordering prevents deadlocks). Check for the existence of a winner in the new bucket and for potential use of the victim (pinCount != 1). If everything looks good, remove the CachedPage from the old bucket, and add it to the new bucket and update its header with the new dpid.
                  */
                 if (victim.dpid < 0) {
                     /*
@@ -240,9 +226,7 @@
                 }
             }
             /*
-             * Victimization failed -- all pages pinned?
-             * wait a bit, increment victimizationTryCount and loop around.
-             * Give up after MAX_VICTIMIZATION_TRY_COUNT trys.
+             * Victimization failed -- all pages pinned? wait a bit, increment victimizationTryCount and loop around. Give up after MAX_VICTIMIZATION_TRY_COUNT trys.
              */
             if (++victimizationTryCount >= MAX_VICTIMIZATION_TRY_COUNT) {
                 return null;
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ClockPageReplacementStrategy.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ClockPageReplacementStrategy.java
index 8d59c64..bfdc8bb 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ClockPageReplacementStrategy.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ClockPageReplacementStrategy.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.buffercache;
 
 import java.util.concurrent.atomic.AtomicBoolean;
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/DirectBufferAllocator.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/DirectBufferAllocator.java
index ffe0356..a808e59 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/DirectBufferAllocator.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/DirectBufferAllocator.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.buffercache;
 
 import java.nio.ByteBuffer;
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IBufferCache.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IBufferCache.java
index cd8a576..759e4d0 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IBufferCache.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IBufferCache.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.buffercache;
 
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IBufferCacheInternal.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IBufferCacheInternal.java
index a517a55..a4a31a7 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IBufferCacheInternal.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IBufferCacheInternal.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.buffercache;
 
 public interface IBufferCacheInternal extends IBufferCache {
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICacheMemoryAllocator.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICacheMemoryAllocator.java
index 03be5b6..4f562ab 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICacheMemoryAllocator.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICacheMemoryAllocator.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.buffercache;
 
 import java.nio.ByteBuffer;
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICachedPage.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICachedPage.java
index c5f60f1..71db7a4 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICachedPage.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICachedPage.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.buffercache;
 
 import java.nio.ByteBuffer;
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICachedPageInternal.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICachedPageInternal.java
index de97ad4..933922d 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICachedPageInternal.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/ICachedPageInternal.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.buffercache;
 
 public interface ICachedPageInternal extends ICachedPage {
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IPageReplacementStrategy.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IPageReplacementStrategy.java
index e4c1ab7..e1b38a3 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IPageReplacementStrategy.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/buffercache/IPageReplacementStrategy.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.buffercache;
 
 public interface IPageReplacementStrategy {
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/file/FileInfo.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/file/FileInfo.java
index 97b1b57..aa2ae79 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/file/FileInfo.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/file/FileInfo.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.file;
 
 import java.io.RandomAccessFile;
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/file/FileManager.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/file/FileManager.java
index b2f309b..226260a 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/file/FileManager.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/file/FileManager.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.file;
 
 import java.io.IOException;
diff --git a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/sync/LatchType.java b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/sync/LatchType.java
index 4772ae0..b0cfdcf 100644
--- a/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/sync/LatchType.java
+++ b/hyracks/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/storage/sync/LatchType.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package edu.uci.ics.hyracks.storage.common.storage.sync;
 
 public enum LatchType {