diff --git a/src/main/java/ghast/database/DataAccessException.java b/src/main/java/ghast/database/DataAccessException.java
index 5c686b5..445a104 100644
--- a/src/main/java/ghast/database/DataAccessException.java
+++ b/src/main/java/ghast/database/DataAccessException.java
@@ -8,15 +8,6 @@ public class DataAccessException extends RuntimeException {
 
 	private String sql;
 
-	public DataAccessException(String msg) {
-		super(msg);
-	}
-
-	public DataAccessException(String msg, String sql) {
-		this(msg);
-		this.sql = sql;
-	}
-
 	public DataAccessException(String msg, Throwable cause) {
 		super(msg, cause);
 	}
diff --git a/src/main/java/ghast/database/EmptyResultDataAccessException.java b/src/main/java/ghast/database/EmptyResultDataAccessException.java
deleted file mode 100644
index 0d42ee1..0000000
--- a/src/main/java/ghast/database/EmptyResultDataAccessException.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package ghast.database;
-
-public class EmptyResultDataAccessException extends IncorrectResultSizeDataAccessException {
-
-	public EmptyResultDataAccessException(int expectedSize) {
-		super(expectedSize);
-	}
-}
diff --git a/src/main/java/ghast/database/IncorrectResultSizeDataAccessException.java b/src/main/java/ghast/database/IncorrectResultSizeDataAccessException.java
deleted file mode 100644
index 5acd10d..0000000
--- a/src/main/java/ghast/database/IncorrectResultSizeDataAccessException.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package ghast.database;
-
-public class IncorrectResultSizeDataAccessException extends DataAccessException {
-
-	public IncorrectResultSizeDataAccessException(int expectedSize) {
-		super("Incorrect result size: expected " + expectedSize);
-	}
-}