diff --git a/makefiles/Makefile.java.mk b/makefiles/Makefile.java.mk
index a5c85e5895a..b4f82c3015a 100755
--- a/makefiles/Makefile.java.mk
+++ b/makefiles/Makefile.java.mk
@@ -46,26 +46,26 @@ test_java: test_java_pimpl
 BUILT_LANGUAGES +=, Java
 endif
 
-$(GEN_DIR)/com/google/ortools/algorithms:
-	-$(MKDIR_P) $(GEN_PATH)$Scom$Sgoogle$Sortools$Salgorithms
+$(GEN_DIR)/java/com/google/ortools/algorithms:
+	-$(MKDIR_P) $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Salgorithms
 
-$(GEN_DIR)/com/google/ortools/constraintsolver:
-	-$(MKDIR_P) $(GEN_PATH)$Scom$Sgoogle$Sortools$Sconstraintsolver
+$(GEN_DIR)/java/com/google/ortools/constraintsolver:
+	-$(MKDIR_P) $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sconstraintsolver
 
-$(GEN_DIR)/com/google/ortools/graph:
-	-$(MKDIR_P) $(GEN_PATH)$Scom$Sgoogle$Sortools$Sgraph
+$(GEN_DIR)/java/com/google/ortools/graph:
+	-$(MKDIR_P) $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sgraph
 
-$(GEN_DIR)/com/google/ortools/linearsolver:
-	-$(MKDIR_P) $(GEN_PATH)$Scom$Sgoogle$Sortools$Slinearsolver
+$(GEN_DIR)/java/com/google/ortools/linearsolver:
+	-$(MKDIR_P) $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Slinearsolver
 
-$(GEN_DIR)/com/google/ortools/flatzinc:
-	-$(MKDIR_P) $(GEN_PATH)$Scom$Sgoogle$Sortools$Sflatzinc
+$(GEN_DIR)/java/com/google/ortools/flatzinc:
+	-$(MKDIR_P) $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sflatzinc
 
-$(GEN_DIR)/com/google/ortools/sat:
-	-$(MKDIR_P) $(GEN_PATH)$Scom$Sgoogle$Sortools$Ssat
+$(GEN_DIR)/java/com/google/ortools/sat:
+	-$(MKDIR_P) $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Ssat
 
-$(GEN_DIR)/com/google/ortools/util:
-	$(MKDIR_P) $(GEN_PATH)$Scom$Sgoogle$Sortools$Sutil
+$(GEN_DIR)/java/com/google/ortools/util:
+	$(MKDIR_P) $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sutil
 
 $(CLASS_DIR):
 	-$(MKDIR_P) $(CLASS_DIR)
@@ -91,12 +91,12 @@ $(GEN_DIR)/ortools/constraint_solver/constraint_solver_java_wrap.cc: \
  $(SRC_DIR)/ortools/util/java/proto.i \
  $(CP_DEPS) \
  $(SRC_DIR)/ortools/constraint_solver/routing.h \
- | $(GEN_DIR)/ortools/constraint_solver $(GEN_DIR)/com/google/ortools/constraintsolver
+ | $(GEN_DIR)/ortools/constraint_solver $(GEN_DIR)/java/com/google/ortools/constraintsolver
 	$(SWIG_BINARY) $(SWIG_INC) -I$(INC_DIR) -c++ -java $(SWIG_DOXYGEN) \
  -o $(GEN_PATH)$Sortools$Sconstraint_solver$Sconstraint_solver_java_wrap.cc \
  -package com.google.ortools.constraintsolver \
  -module main \
- -outdir $(GEN_PATH)$Scom$Sgoogle$Sortools$Sconstraintsolver \
+ -outdir $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sconstraintsolver \
  $(SRC_DIR)$Sortools$Sconstraint_solver$Sjava$Srouting.i
 	$(SED) -i -e 's/< long long >/< int64 >/g' \
  $(GEN_PATH)$Sortools$Sconstraint_solver$Sconstraint_solver_java_wrap.cc
@@ -117,12 +117,12 @@ $(GEN_DIR)/ortools/algorithms/knapsack_solver_java_wrap.cc: \
  $(SRC_DIR)/ortools/base/base.i \
  $(SRC_DIR)/ortools/util/java/vector.i \
  $(SRC_DIR)/ortools/algorithms/knapsack_solver.h \
- | $(GEN_DIR)/ortools/algorithms $(GEN_DIR)/com/google/ortools/algorithms
+ | $(GEN_DIR)/ortools/algorithms $(GEN_DIR)/java/com/google/ortools/algorithms
 	$(SWIG_BINARY) $(SWIG_INC) -I$(INC_DIR) -c++ -java $(SWIG_DOXYGEN) \
  -o $(GEN_PATH)$Sortools$Salgorithms$Sknapsack_solver_java_wrap.cc \
  -package com.google.ortools.algorithms \
  -module main \
- -outdir $(GEN_PATH)$Scom$Sgoogle$Sortools$Salgorithms \
+ -outdir $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Salgorithms \
  $(SRC_DIR)$Sortools$Salgorithms$Sjava$Sknapsack_solver.i
 
 $(OBJ_DIR)/swig/knapsack_solver_java_wrap.$O: \
@@ -136,12 +136,12 @@ $(GEN_DIR)/ortools/graph/graph_java_wrap.cc: \
  $(SRC_DIR)/ortools/graph/java/graph.i \
  $(SRC_DIR)/ortools/base/base.i \
  $(GRAPH_DEPS) \
- | $(GEN_DIR)/ortools/graph $(GEN_DIR)/com/google/ortools/graph
+ | $(GEN_DIR)/ortools/graph $(GEN_DIR)/java/com/google/ortools/graph
 	$(SWIG_BINARY) $(SWIG_INC) -I$(INC_DIR) -c++ -java \
  -o $(GEN_PATH)$Sortools$Sgraph$Sgraph_java_wrap.cc \
  -package com.google.ortools.graph \
  -module main \
- -outdir $(GEN_PATH)$Scom$Sgoogle$Sortools$Sgraph \
+ -outdir $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sgraph \
  $(SRC_DIR)$Sortools$Sgraph$Sjava$Sgraph.i
 
 $(OBJ_DIR)/swig/graph_java_wrap.$O: \
@@ -157,12 +157,12 @@ $(GEN_DIR)/ortools/linear_solver/linear_solver_java_wrap.cc: \
  $(SRC_DIR)/ortools/base/base.i \
  $(SRC_DIR)/ortools/util/java/vector.i \
  $(LP_DEPS) \
- | $(GEN_DIR)/ortools/linear_solver $(GEN_DIR)/com/google/ortools/linearsolver
+ | $(GEN_DIR)/ortools/linear_solver $(GEN_DIR)/java/com/google/ortools/linearsolver
 	$(SWIG_BINARY) $(SWIG_INC) -I$(INC_DIR) -c++ -java $(SWIG_DOXYGEN) \
  -o $(GEN_PATH)$Sortools$Slinear_solver$Slinear_solver_java_wrap.cc \
  -package com.google.ortools.linearsolver \
  -module main_research_linear_solver \
- -outdir $(GEN_PATH)$Scom$Sgoogle$Sortools$Slinearsolver \
+ -outdir $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Slinearsolver \
  $(SRC_DIR)$Sortools$Slinear_solver$Sjava$Slinear_solver.i
 
 $(OBJ_DIR)/swig/linear_solver_java_wrap.$O: \
@@ -177,12 +177,12 @@ $(GEN_DIR)/ortools/sat/sat_java_wrap.cc: \
  $(SRC_DIR)/ortools/sat/java/sat.i \
  $(SRC_DIR)/ortools/base/base.i \
  $(SAT_DEPS) \
- | $(GEN_DIR)/ortools/sat $(GEN_DIR)/com/google/ortools/sat
+ | $(GEN_DIR)/ortools/sat $(GEN_DIR)/java/com/google/ortools/sat
 	$(SWIG_BINARY) $(SWIG_INC) -I$(INC_DIR) -c++ -java \
  -o $(GEN_PATH)$Sortools$Ssat$Ssat_java_wrap.cc \
  -package com.google.ortools.sat \
  -module main \
- -outdir $(GEN_PATH)$Scom$Sgoogle$Sortools$Ssat \
+ -outdir $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Ssat \
  $(SRC_DIR)$Sortools$Ssat$Sjava$Ssat.i
 	$(SED) -i -e 's/< long long >/< int64 >/g' \
  $(GEN_PATH)$Sortools$Ssat$Ssat_java_wrap.cc
@@ -199,12 +199,12 @@ $(GEN_DIR)/ortools/util/util_java_wrap.cc: \
  $(SRC_DIR)/ortools/util/java/sorted_interval_list.i \
  $(SRC_DIR)/ortools/base/base.i \
  $(UTIL_DEPS) \
- | $(GEN_DIR)/ortools/util $(GEN_DIR)/com/google/ortools/util
+ | $(GEN_DIR)/ortools/util $(GEN_DIR)/java/com/google/ortools/util
 	$(SWIG_BINARY) $(SWIG_INC) -I$(INC_DIR) -c++ -java $(SWIG_DOXYGEN) \
  -o $(GEN_PATH)$Sortools$Sutil$Sutil_java_wrap.cc \
  -package com.google.ortools.util \
  -module main \
- -outdir $(GEN_PATH)$Scom$Sgoogle$Sortools$Sutil \
+ -outdir $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sutil \
  $(SRC_DIR)$Sortools$Sutil$Sjava$Ssorted_interval_list.i
 	$(SED) -i -e 's/< long long >/< int64 >/g' \
  $(GEN_PATH)$Sortools$Sutil$Sutil_java_wrap.cc
@@ -243,68 +243,68 @@ $(LIB_DIR)/protobuf.jar: \
  | $(LIB_DIR)
 	$(COPY) dependencies$Sinstall$Slib$Sprotobuf.jar $(LIB_DIR)
 
-$(GEN_DIR)/com/google/ortools/constraintsolver/SearchLimitProtobuf.java: \
+$(GEN_DIR)/java/com/google/ortools/constraintsolver/SearchLimitProtobuf.java: \
  $(SRC_DIR)/ortools/constraint_solver/search_limit.proto \
- | $(GEN_DIR)/com/google/ortools/constraintsolver
-	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH) $(SRC_DIR)$Sortools$Sconstraint_solver$Ssearch_limit.proto
+ | $(GEN_DIR)/java/com/google/ortools/constraintsolver
+	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH)$Sjava $(SRC_DIR)$Sortools$Sconstraint_solver$Ssearch_limit.proto
 
-$(GEN_DIR)/com/google/ortools/constraintsolver/SolverParameters.java: \
+$(GEN_DIR)/java/com/google/ortools/constraintsolver/SolverParameters.java: \
  $(SRC_DIR)/ortools/constraint_solver/solver_parameters.proto \
- | $(GEN_DIR)/com/google/ortools/constraintsolver
-	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH) $(SRC_DIR)$Sortools$Sconstraint_solver$Ssolver_parameters.proto
+ | $(GEN_DIR)/java/com/google/ortools/constraintsolver
+	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH)$Sjava $(SRC_DIR)$Sortools$Sconstraint_solver$Ssolver_parameters.proto
 
-$(GEN_DIR)/com/google/ortools/constraintsolver/RoutingParameters.java: \
+$(GEN_DIR)/java/com/google/ortools/constraintsolver/RoutingParameters.java: \
  $(SRC_DIR)/ortools/constraint_solver/routing_parameters.proto \
- | $(GEN_DIR)/com/google/ortools/constraintsolver
-	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH) $(SRC_DIR)$Sortools$Sconstraint_solver$Srouting_parameters.proto
+ | $(GEN_DIR)/java/com/google/ortools/constraintsolver
+	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH)$Sjava $(SRC_DIR)$Sortools$Sconstraint_solver$Srouting_parameters.proto
 
-$(GEN_DIR)/com/google/ortools/constraintsolver/RoutingEnums.java: \
+$(GEN_DIR)/java/com/google/ortools/constraintsolver/RoutingEnums.java: \
  $(SRC_DIR)/ortools/constraint_solver/routing_enums.proto \
- | $(GEN_DIR)/com/google/ortools/constraintsolver
-	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH) $(SRC_DIR)$Sortools$Sconstraint_solver$Srouting_enums.proto
+ | $(GEN_DIR)/java/com/google/ortools/constraintsolver
+	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH)$Sjava $(SRC_DIR)$Sortools$Sconstraint_solver$Srouting_enums.proto
 
-$(GEN_DIR)/com/google/ortools/linearsolver/MPModelProto.java: \
+$(GEN_DIR)/java/com/google/ortools/linearsolver/MPModelProto.java: \
  $(SRC_DIR)/ortools/linear_solver/linear_solver.proto \
- | $(GEN_DIR)/com/google/ortools/linearsolver
-	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH) $(SRC_DIR)$Sortools$Slinear_solver$Slinear_solver.proto
+ | $(GEN_DIR)/java/com/google/ortools/linearsolver
+	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH)$Sjava $(SRC_DIR)$Sortools$Slinear_solver$Slinear_solver.proto
 
-$(GEN_DIR)/com/google/ortools/sat/CpModel.java: \
+$(GEN_DIR)/java/com/google/ortools/sat/CpModel.java: \
  $(SRC_DIR)/ortools/sat/cp_model.proto \
- | $(GEN_DIR)/com/google/ortools/sat
-	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH) $(SRC_DIR)$Sortools$Ssat$Scp_model.proto
+ | $(GEN_DIR)/java/com/google/ortools/sat
+	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH)$Sjava $(SRC_DIR)$Sortools$Ssat$Scp_model.proto
 
-$(GEN_DIR)/com/google/ortools/sat/SatParameters.java: \
+$(GEN_DIR)/java/com/google/ortools/sat/SatParameters.java: \
  $(SRC_DIR)/ortools/sat/sat_parameters.proto \
- | $(GEN_DIR)/com/google/ortools/sat
-	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH) $(SRC_DIR)$Sortools$Ssat$Ssat_parameters.proto
+ | $(GEN_DIR)/java/com/google/ortools/sat
+	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH)$Sjava $(SRC_DIR)$Sortools$Ssat$Ssat_parameters.proto
 
-$(GEN_DIR)/com/google/ortools/util/OptionalBoolean.java: \
+$(GEN_DIR)/java/com/google/ortools/util/OptionalBoolean.java: \
  $(SRC_DIR)/ortools/util/optional_boolean.proto \
- | $(GEN_DIR)/com/google/ortools/util
-	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH) $(SRC_DIR)$Sortools$Sutil$Soptional_boolean.proto
+ | $(GEN_DIR)/java/com/google/ortools/util
+	$(PROTOC) --proto_path=$(SRC_DIR) --java_out=$(GEN_PATH)$Sjava $(SRC_DIR)$Sortools$Sutil$Soptional_boolean.proto
 
 $(JAVA_OR_TOOLS_LIBS): \
  $(JAVA_OR_TOOLS_NATIVE_LIBS) \
  $(LIB_DIR)/protobuf.jar \
- $(GEN_DIR)/com/google/ortools/constraintsolver/SolverParameters.java \
- $(GEN_DIR)/com/google/ortools/constraintsolver/SearchLimitProtobuf.java \
- $(GEN_DIR)/com/google/ortools/constraintsolver/RoutingParameters.java \
- $(GEN_DIR)/com/google/ortools/constraintsolver/RoutingEnums.java \
- $(GEN_DIR)/com/google/ortools/linearsolver/MPModelProto.java \
- $(GEN_DIR)/com/google/ortools/sat/SatParameters.java \
- $(GEN_DIR)/com/google/ortools/util/OptionalBoolean.java \
- $(GEN_DIR)/com/google/ortools/sat/CpModel.java | \
+ $(GEN_DIR)/java/com/google/ortools/constraintsolver/SolverParameters.java \
+ $(GEN_DIR)/java/com/google/ortools/constraintsolver/SearchLimitProtobuf.java \
+ $(GEN_DIR)/java/com/google/ortools/constraintsolver/RoutingParameters.java \
+ $(GEN_DIR)/java/com/google/ortools/constraintsolver/RoutingEnums.java \
+ $(GEN_DIR)/java/com/google/ortools/linearsolver/MPModelProto.java \
+ $(GEN_DIR)/java/com/google/ortools/sat/SatParameters.java \
+ $(GEN_DIR)/java/com/google/ortools/util/OptionalBoolean.java \
+ $(GEN_DIR)/java/com/google/ortools/sat/CpModel.java | \
  $(CLASS_DIR)/com/google/ortools
 	"$(JAVAC_BIN)" -encoding UTF-8 -d $(CLASS_DIR) \
  -cp $(LIB_DIR)$Sprotobuf.jar \
- $(SRC_DIR)$Sortools$Scom$Sgoogle$Sortools$Sconstraintsolver$S*.java \
- $(SRC_DIR)$Sortools$Scom$Sgoogle$Sortools$Ssat$S*.java \
- $(GEN_PATH)$Scom$Sgoogle$Sortools$Sconstraintsolver$S*.java \
- $(GEN_PATH)$Scom$Sgoogle$Sortools$Ssat$S*.java \
- $(GEN_PATH)$Scom$Sgoogle$Sortools$Sutil$S*.java \
- $(GEN_PATH)$Scom$Sgoogle$Sortools$Salgorithms$S*.java \
- $(GEN_PATH)$Scom$Sgoogle$Sortools$Sgraph$S*.java \
- $(GEN_PATH)$Scom$Sgoogle$Sortools$Slinearsolver$S*.java
+ $(SRC_DIR)$Sortools$Sjava$Scom$Sgoogle$Sortools$Sconstraintsolver$S*.java \
+ $(SRC_DIR)$Sortools$Sjava$Scom$Sgoogle$Sortools$Ssat$S*.java \
+ $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sconstraintsolver$S*.java \
+ $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Ssat$S*.java \
+ $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sutil$S*.java \
+ $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Salgorithms$S*.java \
+ $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Sgraph$S*.java \
+ $(GEN_PATH)$Sjava$Scom$Sgoogle$Sortools$Slinearsolver$S*.java
 	"$(JAR_BIN)" cvf $(LIB_DIR)$Scom.google.ortools.jar -C $(CLASS_DIR) com$Sgoogle$Sortools$S
 
 ###################
diff --git a/ortools/com/google/ortools/constraintsolver/IntIntToLongFunction.java b/ortools/java/com/google/ortools/constraintsolver/IntIntToLongFunction.java
similarity index 100%
rename from ortools/com/google/ortools/constraintsolver/IntIntToLongFunction.java
rename to ortools/java/com/google/ortools/constraintsolver/IntIntToLongFunction.java
diff --git a/ortools/com/google/ortools/constraintsolver/JavaDecisionBuilder.java b/ortools/java/com/google/ortools/constraintsolver/JavaDecisionBuilder.java
similarity index 100%
rename from ortools/com/google/ortools/constraintsolver/JavaDecisionBuilder.java
rename to ortools/java/com/google/ortools/constraintsolver/JavaDecisionBuilder.java
diff --git a/ortools/com/google/ortools/constraintsolver/LongTernaryOperator.java b/ortools/java/com/google/ortools/constraintsolver/LongTernaryOperator.java
similarity index 100%
rename from ortools/com/google/ortools/constraintsolver/LongTernaryOperator.java
rename to ortools/java/com/google/ortools/constraintsolver/LongTernaryOperator.java
diff --git a/ortools/com/google/ortools/constraintsolver/LongTernaryPredicate.java b/ortools/java/com/google/ortools/constraintsolver/LongTernaryPredicate.java
similarity index 100%
rename from ortools/com/google/ortools/constraintsolver/LongTernaryPredicate.java
rename to ortools/java/com/google/ortools/constraintsolver/LongTernaryPredicate.java
diff --git a/ortools/com/google/ortools/sat/Constraint.java b/ortools/java/com/google/ortools/sat/Constraint.java
similarity index 100%
rename from ortools/com/google/ortools/sat/Constraint.java
rename to ortools/java/com/google/ortools/sat/Constraint.java
diff --git a/ortools/com/google/ortools/sat/CpModel.java b/ortools/java/com/google/ortools/sat/CpModel.java
similarity index 100%
rename from ortools/com/google/ortools/sat/CpModel.java
rename to ortools/java/com/google/ortools/sat/CpModel.java
diff --git a/ortools/com/google/ortools/sat/CpSolver.java b/ortools/java/com/google/ortools/sat/CpSolver.java
similarity index 100%
rename from ortools/com/google/ortools/sat/CpSolver.java
rename to ortools/java/com/google/ortools/sat/CpSolver.java
diff --git a/ortools/com/google/ortools/sat/CpSolverSolutionCallback.java b/ortools/java/com/google/ortools/sat/CpSolverSolutionCallback.java
similarity index 100%
rename from ortools/com/google/ortools/sat/CpSolverSolutionCallback.java
rename to ortools/java/com/google/ortools/sat/CpSolverSolutionCallback.java
diff --git a/ortools/com/google/ortools/sat/Difference.java b/ortools/java/com/google/ortools/sat/Difference.java
similarity index 100%
rename from ortools/com/google/ortools/sat/Difference.java
rename to ortools/java/com/google/ortools/sat/Difference.java
diff --git a/ortools/com/google/ortools/sat/IntVar.java b/ortools/java/com/google/ortools/sat/IntVar.java
similarity index 100%
rename from ortools/com/google/ortools/sat/IntVar.java
rename to ortools/java/com/google/ortools/sat/IntVar.java
diff --git a/ortools/com/google/ortools/sat/IntervalVar.java b/ortools/java/com/google/ortools/sat/IntervalVar.java
similarity index 100%
rename from ortools/com/google/ortools/sat/IntervalVar.java
rename to ortools/java/com/google/ortools/sat/IntervalVar.java
diff --git a/ortools/com/google/ortools/sat/LinearExpr.java b/ortools/java/com/google/ortools/sat/LinearExpr.java
similarity index 100%
rename from ortools/com/google/ortools/sat/LinearExpr.java
rename to ortools/java/com/google/ortools/sat/LinearExpr.java
diff --git a/ortools/com/google/ortools/sat/Literal.java b/ortools/java/com/google/ortools/sat/Literal.java
similarity index 100%
rename from ortools/com/google/ortools/sat/Literal.java
rename to ortools/java/com/google/ortools/sat/Literal.java
diff --git a/ortools/com/google/ortools/sat/NotBooleanVariable.java b/ortools/java/com/google/ortools/sat/NotBooleanVariable.java
similarity index 100%
rename from ortools/com/google/ortools/sat/NotBooleanVariable.java
rename to ortools/java/com/google/ortools/sat/NotBooleanVariable.java
diff --git a/ortools/com/google/ortools/sat/ScalProd.java b/ortools/java/com/google/ortools/sat/ScalProd.java
similarity index 100%
rename from ortools/com/google/ortools/sat/ScalProd.java
rename to ortools/java/com/google/ortools/sat/ScalProd.java
diff --git a/ortools/com/google/ortools/sat/SumOfVariables.java b/ortools/java/com/google/ortools/sat/SumOfVariables.java
similarity index 100%
rename from ortools/com/google/ortools/sat/SumOfVariables.java
rename to ortools/java/com/google/ortools/sat/SumOfVariables.java